Harpenden to St Albans Walk

A Hertfordshire Town and a Hertfordshire City linked by commons, parks, a country estate and a new woodland forest.

Hiking weather forecast

Hertfordshire hourly weather (Visual Crossing)

Sunset: 21:09. Dusk: 21:54. Dark: 22:57. Moon 39% (23:56 to dawn)

Updated: Fri, 18-Jul at 08:39

06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21
Today 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 45% 45%
Sat, 19 Jul 74% 74% 68% 68% 68% 68% 68% 68% 58% 58% 58% 58% 58% 58% 23% 23%
Sun, 20 Jul 26% 26% 52% 52% 52% 52% 52% 52% 55% 55% 55% 55% 55% 55% 36% 36%
Mon, 21 Jul 23% 23% 65% 65% 65% 65% 65% 65% 65% 65% 65% 65% 65% 65% 52% 52%
Tue, 22 Jul 0% 0% 29% 29% 29% 29% 29% 29% 48% 48% 48% 48% 48% 48% 45% 45%
Wed, 23 Jul 16% 16% 29% 29% 29% 29% 29% 29% 61% 61% 61% 61% 61% 61% 48% 48%
Thu, 24 Jul 3% 3% 10% 10% 10% 10% 10% 10% 26% 26% 26% 26% 26% 26% 19% 19%
Fri, 25 Jul 3% 3% 3% 3% 3% 3% 3% 3% 10% 10% 10% 10% 10% 10% 10% 10%
Sat, 26 Jul 3% 3% 7% 7% 7% 7% 7% 7% 23% 23% 23% 23% 23% 23% 16% 16%
Sun, 27 Jul 3% 3% 7% 7% 7% 7% 7% 7% 10% 10% 10% 10% 10% 10% 16% 16%
Mon, 28 Jul 7% 7% 10% 10% 10% 10% 10% 10% 16% 16% 16% 16% 16% 16% 16% 16%
Tue, 29 Jul 10% 10% 13% 13% 13% 13% 13% 13% 7% 7% 7% 7% 7% 7% 10% 10%
Wed, 30 Jul 13% 13% 19% 19% 19% 19% 19% 19% 32% 32% 32% 32% 32% 32% 23% 23%
Thu, 31 Jul 7% 7% 23% 23% 23% 23% 23% 23% 23% 23% 23% 23% 23% 23% 19% 19%
Fri, 01 Aug 13% 13% 13% 13% 13% 13% 13% 13% 16% 16% 16% 16% 16% 16% 13% 13%

Percentages are the chance of rain.

Weather data by Visual Crossing

Hertfordshire hourly weather (Open Meteo)

Sunset: 21:09. Dusk: 21:54. Dark: 22:57. Moon 39% (23:56 to dawn)

Updated: Fri, 18-Jul at 08:36

06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21
Today 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 3% 3%
Sat, 19 Jul 88% 90% 93% 90% 83% 73% 63% 68% 65% 55% 53% 40% 28% 20% 10% 5%
Sun, 20 Jul 54% 70% 74% 72% 68% 62% 53% 45% 38% 32% 25% 18% 11% 5% 2% 0%
Mon, 21 Jul 42% 48% 53% 58% 64% 68% 72% 75% 78% 80% 82% 83% 82% 78% 70% 59%
Tue, 22 Jul 14% 15% 15% 16% 16% 17% 18% 20% 23% 27% 32% 37% 40% 40% 37% 32%
Wed, 23 Jul 14% 13% 12% 11% 10% 10% 10% 10% 11% 12% 13% 15% 17% 19% 22% 23%
Thu, 24 Jul 24% 22% 20% 18% 17% 15% 14% 13% 12% 12% 11% 11% 10% 10% 10% 9%
Fri, 25 Jul 6% 5% 5% 4% 4% 4% 3% 3% 17% 21% 23% 21% 17% 13% 12% 11%
Sat, 26 Jul 10% 10% 11% 12% 13% 15% 17% 19% 19% 18% 19% 22% 26% 29% 30% 29%
Sun, 27 Jul 4% 3% 3% 4% 6% 10% 14% 19% 24% 29% 32% 32% 31% 29% 26% 23%
Mon, 28 Jul 11% 13% 14% 14% 15% 16% 17% 19% 22% 26% 29% 32% 34% 35% 33% 29%
Tue, 29 Jul 10% 10% 10% 10% 10% 10% 11% 13% 17% 22% 27% 32% 36% 39% 39% 37%
Wed, 30 Jul 12% 10% 9% 10% 10% 11% 12% 13% 15% 18% 21% 23% 25% 26% 25% 22%
Thu, 31 Jul 9% 10% 11% 13% 15% 17% 18% 19% 19% 19% 19% 18% 17% 16% 14% 12%
Fri, 01 Aug 15% 16% 16% 16% 15% 14% 13% 13% 14% 17% 19% 21% 23% 23% 21% 17%
Sat, 02 Aug 5% 6% 6% 7% 7% 8% 8% 10% 13% 17% 21% 24% 28% 29% 28% 24%

Percentages are the chance of rain.

Weather data by Open-Meteo

Hertfordshire hourly weather (Met Office)

Sunset: 21:09. Dusk: 21:54. Dark: 22:57. Moon 39% (23:56 to dawn)

Updated: Fri, 18-Jul at 08:00

06 09 12 15 18 21
Today 1% 0% 1% 6% 6%
Sat, 19 Jul 87% 73% 65% 65% 36% 8%
Sun, 20 Jul 47% 50% 46% 38% 32% 3%
Mon, 21 Jul 31% 44% 64% 61% 39% 4%
Tue, 22 Jul 9% 10% 36% 57% 42% 8%
Wed, 23 Jul 10% 34% 41% 40% 38% 9%
Thu, 24 Jul 7% 29% 34% 37% 31% 6%
Fri, 25 Jul 4%

Percentages are the chance of rain.

Weather data by Met Office

Regional weather (Met Office)

Sunset: 21:09. Dusk: 21:54. Dark: 22:57. Moon 39% (23:56 to dawn)

Updated: Fri, 18-Jul at 08:38

East England

Warm and humid with a risk of thundery showers.

  • A bery warm and humid day with sunny spells and isolated showers, these perhaps heavy and thundery during the afternoon, especially across north Norfolk
  • Winds generally light away from showers
  • Maximum Temperature 30C

Tonight:

  • A muggy night with showers gradually dissipating, before areas of heavy, thundery rain move across the region later in the evening and continue into the early hours of Saturday morning
  • Minimum Temperature 18C

Saturday:

  • Turning slightly cooler and unsettled with widespread, often heavy and thundery rain perhaps lasting much of the day, before clearing into the evening to give another muggy night
  • Maximum Temperature 25C

Outlook for Sunday to Tuesday:

  • Remaining unsettled, with a mixture of sunny spells and rain or thundery showers throughout the period
  • Feeling warm in any sunny spells, with mainly light winds away from showers

UK Day 6-7 and week 2

  • Overall a rather more changeable pattern of weather through this period, compared to much of the summer thus far
  • Tuesday will likely see a continuation of heavy, perhaps thundery showers, although the focus may be more across the north and east by this stage
  • Thereafter, a general westerly regime looks to become established, with occasional weather systems moving in from the Atlantic
  • This means further rain or showers and breezy conditions at times, especially in the northwest
  • This will be interspersed with some drier, sunnier periods
  • Temperatures are expected to average out above normal with some humid conditions possible at times making it feel particularly warm in any sunshine
  • This broad pattern is likely to continue through to the end of July

UK Week 3 and 4

  • The rather changeable pattern will likely continue through early August with spells of rain or showers mixed in with some drier, brighter days
  • Towards mid-August, there are tentative signs that high pressure may become rather more dominant, which could bring more in the way dry, settled weather more widely
  • Temperatures will likely continue to be above average overall, with the possibility of very warm or hot spells developing later in the period, especially further south and east

Weather data by Met Office

Hertfordshire Air Quality (Pollen and UV)

Updated: Fri, 18-Jul at 08:36

Key : Low Medium High Very High

00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23
Today air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q   grass mugwort air q   grass mugwort air q   grass mugwort
Sat, 19 Jul air q   grass mugwort air q   grass mugwort air q   grass mugwort air q   grass mugwort air q   grass mugwort air q   grass mugwort air q UV grass mugwort air q UV grass   air q UV grass   air q UV     air q UV     air q UV     air q UV     air q UV     air q UV     air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q   grass mugwort air q   grass mugwort air q   grass mugwort
Sun, 20 Jul air q   grass mugwort air q   grass mugwort air q   grass mugwort air q   grass mugwort air q   grass mugwort air q   grass mugwort air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q UV   mugwort air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q UV grass mugwort air q   grass mugwort air q   grass mugwort air q   grass mugwort
Mon, 21 Jul air q   grass mugwort air q   grass mugwort air q       air q       air q       air q       air q UV     air q UV     air q UV     air q UV     air q UV     air q UV     air q UV     air q UV     air q UV     air q UV     air q UV     air q UV     air q UV     air q UV     air q UV     air q       air q       air q      

Pollens

These pollens are shown (in season):

  • Grass
  • Alder and birch (trees)
  • Mugwort and Ragweed (weeds)

When out walking, wraparound glasses, a disposable or washable facemask, and being at the front of the group, all help.

Other forecasts: Met Office, University of Worcester

UV and Air Quality

The UV forecast takes account of cloud cover.

"Air Q", the European Air Quality index, is a mix of dust/particulates, ozone, sulphur and nitrous oxides

Data

Weather data by Open-Meteo and CAMS ENSEMBLE

Hertfordshire Visibility

Updated: Fri, 18-Jul at 08:36

06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21
Today 10km 24km 42km 55km 68km 74km 74km 76km 76km 76km 76km 74km 71km 69km
Sat, 19 Jul 1km 1km 1km 1km 7km 10km 19km 25km 46km 54km 31km 47km 45km 46km 28km 32km
Sun, 20 Jul 24km 17km 10km 10km 13km 28km 50km 56km 71km 69km 70km 70km 72km 72km 68km 64km
Mon, 21 Jul 8km 11km 21km 30km 39km 46km 52km 58km 49km 39km 30km 40km 50km 60km 49km 38km
Tue, 22 Jul 15km 15km 29km 42km 55km 59km 64km 69km 70km 71km 72km 64km 56km 47km 36km 25km

Visibility in km. Above 50km is 'good'. Humidity and air pollution make it worse. Theoretical maximum is 300km/200 miles in clean dry polar air.

On the South Downs, at ~ 170m/500ft, the horizon is is ~ 45km/30 miles away. On a mountain at 1,000m/3,000ft, it is ~ 160km/100 miles away. Formula: horizon in km = √ (13 x altitude in m)

Weather data by Open-Meteo

Hertfordshire daylight

Date Light Dawn Sunrise Max Ht. Sunset Dusk Dark Day Length
Fri, 18-Jul 03:15 04:19 05:03 13:07 21:09 21:54 22:57 17:34
Sat, 19-Jul 03:17 04:20 05:05 13:07 21:08 21:52 22:55 17:31
Sun, 20-Jul 03:19 04:22 05:06 13:07 21:07 21:51 22:53 17:28
Mon, 21-Jul 03:21 04:24 05:07 13:07 21:06 21:49 22:51 17:25
Tue, 22-Jul 03:24 04:25 05:09 13:07 21:04 21:48 22:48 17:22
Wed, 23-Jul 03:26 04:27 05:10 13:07 21:03 21:46 22:46 17:19
Thu, 24-Jul 03:28 04:28 05:11 13:07 21:02 21:44 22:44 17:15
Fri, 25-Jul 03:31 04:30 05:13 13:07 21:00 21:43 22:42 17:12
Sat, 26-Jul 03:33 04:32 05:14 13:07 20:59 21:41 22:39 17:09
Sun, 27-Jul 03:35 04:34 05:16 13:07 20:57 21:39 22:37 17:05
Mon, 28-Jul 03:38 04:35 05:17 13:07 20:56 21:38 22:35 17:02
Tue, 29-Jul 03:40 04:37 05:19 13:07 20:54 21:36 22:32 16:58
Wed, 30-Jul 03:42 04:39 05:20 13:07 20:53 21:34 22:30 16:55
Thu, 31-Jul 03:45 04:40 05:22 13:07 20:51 21:32 22:27 16:51
Fri, 01-Aug 03:47 04:42 05:23 13:07 20:49 21:30 22:25 16:47
Sat, 02-Aug 03:49 04:44 05:25 13:07 20:48 21:28 22:22 16:44
Sun, 03-Aug 03:52 04:46 05:26 13:07 20:46 21:26 22:20 16:40
Mon, 04-Aug 03:54 04:48 05:28 13:07 20:44 21:24 22:17 16:36
Tue, 05-Aug 03:56 04:49 05:29 13:06 20:42 21:22 22:15 16:32
Wed, 06-Aug 03:58 04:51 05:31 13:06 20:41 21:20 22:12 16:29
Thu, 07-Aug 04:01 04:53 05:33 13:06 20:39 21:18 22:10 16:25
Fri, 08-Aug 04:03 04:55 05:34 13:06 20:37 21:16 22:07 16:21
Sat, 09-Aug 04:05 04:57 05:36 13:06 20:35 21:14 22:05 16:17
Sun, 10-Aug 04:08 04:58 05:37 13:06 20:33 21:12 22:02 16:13
Mon, 11-Aug 04:10 05:00 05:39 13:06 20:31 21:10 22:00 16:09
Tue, 12-Aug 04:12 05:02 05:41 13:05 20:29 21:08 21:57 16:05
Wed, 13-Aug 04:14 05:04 05:42 13:05 20:27 21:05 21:54 16:01
Thu, 14-Aug 04:17 05:06 05:44 13:05 20:25 21:03 21:52 15:57
Fri, 15-Aug 04:19 05:07 05:45 13:05 20:23 21:01 21:49 15:53
Sat, 16-Aug 04:21 05:09 05:47 13:05 20:21 20:59 21:47 15:49
Sun, 17-Aug 04:23 05:11 05:49 13:04 20:19 20:57 21:44 15:45
Mon, 18-Aug 04:25 05:13 05:50 13:04 20:17 20:54 21:41 15:41
Tue, 19-Aug 04:28 05:15 05:52 13:04 20:15 20:52 21:39 15:37
Wed, 20-Aug 04:30 05:16 05:53 13:04 20:13 20:50 21:36 15:33
Thu, 21-Aug 04:32 05:18 05:55 13:04 20:11 20:48 21:34 15:29
Fri, 22-Aug 04:34 05:20 05:57 13:03 20:09 20:45 21:31 15:25
Sat, 23-Aug 04:36 05:22 05:58 13:03 20:07 20:43 21:28 15:21
Sun, 24-Aug 04:38 05:24 06:00 13:03 20:05 20:41 21:26 15:17
Mon, 25-Aug 04:40 05:25 06:01 13:02 20:02 20:38 21:23 15:13
Tue, 26-Aug 04:42 05:27 06:03 13:02 20:00 20:36 21:21 15:08
Wed, 27-Aug 04:44 05:29 06:05 13:02 19:58 20:34 21:18 15:04
Thu, 28-Aug 04:46 05:31 06:06 13:02 19:56 20:31 21:15 15:00
Fri, 29-Aug 04:48 05:32 06:08 13:01 19:54 20:29 21:13 14:56
Sat, 30-Aug 04:50 05:34 06:10 13:01 19:51 20:27 21:10 14:52
Sun, 31-Aug 04:52 05:36 06:11 13:01 19:49 20:24 21:07 14:48
Mon, 01-Sep 04:54 05:38 06:13 13:00 19:47 20:22 21:05 14:44
Tue, 02-Sep 04:56 05:39 06:14 13:00 19:45 20:20 21:02 14:40
Wed, 03-Sep 04:58 05:41 06:16 13:00 19:42 20:17 21:00 14:36
Thu, 04-Sep 05:00 05:43 06:18 12:59 19:40 20:15 20:57 14:31
Fri, 05-Sep 05:02 05:45 06:19 12:59 19:38 20:12 20:54 14:27
Sat, 06-Sep 05:04 05:46 06:21 12:59 19:36 20:10 20:52 14:23
Sun, 07-Sep 05:06 05:48 06:22 12:58 19:33 20:08 20:49 14:19
Mon, 08-Sep 05:08 05:50 06:24 12:58 19:31 20:05 20:47 14:15
Tue, 09-Sep 05:10 05:51 06:26 12:58 19:29 20:03 20:44 14:11
Wed, 10-Sep 05:12 05:53 06:27 12:57 19:26 20:00 20:42 14:07
Thu, 11-Sep 05:14 05:55 06:29 12:57 19:24 19:58 20:39 14:03
Fri, 12-Sep 05:15 05:56 06:31 12:57 19:22 19:56 20:37 13:59
Sat, 13-Sep 05:17 05:58 06:32 12:56 19:19 19:53 20:34 13:55
Sun, 14-Sep 05:19 06:00 06:34 12:56 19:17 19:51 20:31 13:51
Mon, 15-Sep 05:21 06:01 06:35 12:56 19:15 19:49 20:29 13:47
Tue, 16-Sep 05:23 06:03 06:37 12:55 19:12 19:46 20:26 13:42
Wed, 17-Sep 05:24 06:05 06:39 12:55 19:10 19:44 20:24 13:38
Thu, 18-Sep 05:26 06:06 06:40 12:55 19:08 19:41 20:21 13:34
Fri, 19-Sep 05:28 06:08 06:42 12:54 19:05 19:39 20:19 13:30
Sat, 20-Sep 05:30 06:10 06:43 12:54 19:03 19:37 20:16 13:26
Sun, 21-Sep 05:32 06:11 06:45 12:53 19:01 19:34 20:14 13:22
Mon, 22-Sep 05:33 06:13 06:47 12:53 18:58 19:32 20:12 13:18
Tue, 23-Sep 05:35 06:15 06:48 12:53 18:56 19:30 20:09 13:14
Wed, 24-Sep 05:37 06:16 06:50 12:52 18:54 19:27 20:07 13:10
Thu, 25-Sep 05:39 06:18 06:52 12:52 18:51 19:25 20:04 13:06
Fri, 26-Sep 05:40 06:20 06:53 12:52 18:49 19:23 20:02 13:02
Sat, 27-Sep 05:42 06:21 06:55 12:51 18:47 19:20 19:59 12:58
Sun, 28-Sep 05:44 06:23 06:57 12:51 18:45 19:18 19:57 12:54
Mon, 29-Sep 05:46 06:25 06:58 12:51 18:42 19:16 19:55 12:50
Tue, 30-Sep 05:47 06:26 07:00 12:50 18:40 19:13 19:52 12:46
Wed, 01-Oct 05:49 06:28 07:02 12:50 18:38 19:11 19:50 12:42
Thu, 02-Oct 05:51 06:30 07:03 12:50 18:35 19:09 19:48 12:39
Fri, 03-Oct 05:52 06:31 07:05 12:49 18:33 19:06 19:45 12:35
Sat, 04-Oct 05:54 06:33 07:07 12:49 18:31 19:04 19:43 12:31
Sun, 05-Oct 05:56 06:35 07:08 12:49 18:28 19:02 19:41 12:27
Mon, 06-Oct 05:57 06:36 07:10 12:49 18:26 19:00 19:39 12:23
Tue, 07-Oct 05:59 06:38 07:12 12:48 18:24 18:57 19:36 12:19
Wed, 08-Oct 06:01 06:40 07:13 12:48 18:22 18:55 19:34 12:15
Thu, 09-Oct 06:02 06:41 07:15 12:48 18:19 18:53 19:32 12:11
Fri, 10-Oct 06:04 06:43 07:17 12:47 18:17 18:51 19:30 12:07
Sat, 11-Oct 06:06 06:45 07:18 12:47 18:15 18:49 19:28 12:04
Sun, 12-Oct 06:07 06:46 07:20 12:47 18:13 18:47 19:25 12:00
Mon, 13-Oct 06:09 06:48 07:22 12:47 18:11 18:44 19:23 11:56
Tue, 14-Oct 06:11 06:50 07:23 12:46 18:08 18:42 19:21 11:52
Wed, 15-Oct 06:12 06:51 07:25 12:46 18:06 18:40 19:19 11:49
Thu, 16-Oct 06:14 06:53 07:27 12:46 18:04 18:38 19:17 11:45
Fri, 17-Oct 06:16 06:55 07:29 12:46 18:02 18:36 19:15 11:41
Sat, 18-Oct 06:17 06:56 07:30 12:46 18:00 18:34 19:13 11:37
Sun, 19-Oct 06:19 06:58 07:32 12:45 17:58 18:32 19:11 11:34
Mon, 20-Oct 06:20 07:00 07:34 12:45 17:56 18:30 19:09 11:30
Tue, 21-Oct 06:22 07:01 07:36 12:45 17:54 18:28 19:07 11:26
Wed, 22-Oct 06:24 07:03 07:37 12:45 17:52 18:26 19:05 11:23
Thu, 23-Oct 06:25 07:05 07:39 12:45 17:50 18:24 19:03 11:19
Fri, 24-Oct 06:27 07:06 07:41 12:45 17:48 18:22 19:01 11:15
Sat, 25-Oct 06:29 07:08 07:43 12:45 17:46 18:20 19:00 11:12
Sun, 26-Oct 05:30 06:10 06:44 11:44 16:44 17:18 17:58 11:08
Mon, 27-Oct 05:32 06:11 06:46 11:44 16:42 17:17 17:56 11:05
Tue, 28-Oct 05:33 06:13 06:48 11:44 16:40 17:15 17:54 11:01
Wed, 29-Oct 05:35 06:15 06:50 11:44 16:38 17:13 17:52 10:58
Thu, 30-Oct 05:37 06:16 06:52 11:44 16:36 17:11 17:51 10:54
Fri, 31-Oct 05:38 06:18 06:53 11:44 16:34 17:09 17:49 10:51
Sat, 01-Nov 05:40 06:20 06:55 11:44 16:32 17:08 17:47 10:48
Sun, 02-Nov 05:41 06:21 06:57 11:44 16:30 17:06 17:46 10:44
Mon, 03-Nov 05:43 06:23 06:59 11:44 16:29 17:04 17:44 10:41
Tue, 04-Nov 05:45 06:25 07:00 11:44 16:27 17:03 17:43 10:38
Wed, 05-Nov 05:46 06:26 07:02 11:44 16:25 17:01 17:41 10:34
Thu, 06-Nov 05:48 06:28 07:04 11:44 16:23 17:00 17:40 10:31
Fri, 07-Nov 05:49 06:30 07:06 11:44 16:22 16:58 17:38 10:28
Sat, 08-Nov 05:51 06:31 07:08 11:44 16:20 16:56 17:37 10:25
Sun, 09-Nov 05:52 06:33 07:09 11:44 16:19 16:55 17:35 10:22
Mon, 10-Nov 05:54 06:35 07:11 11:44 16:17 16:54 17:34 10:19
Tue, 11-Nov 05:56 06:36 07:13 11:45 16:15 16:52 17:33 10:16
Wed, 12-Nov 05:57 06:38 07:15 11:45 16:14 16:51 17:32 10:13
Thu, 13-Nov 05:59 06:39 07:16 11:45 16:12 16:49 17:30 10:10
Fri, 14-Nov 06:00 06:41 07:18 11:45 16:11 16:48 17:29 10:07
Sat, 15-Nov 06:02 06:43 07:20 11:45 16:10 16:47 17:28 10:04
Sun, 16-Nov 06:03 06:44 07:22 11:45 16:08 16:46 17:27 10:01
Mon, 17-Nov 06:05 06:46 07:23 11:45 16:07 16:45 17:26 09:58
Tue, 18-Nov 06:06 06:47 07:25 11:46 16:06 16:43 17:25 09:56
Wed, 19-Nov 06:07 06:49 07:27 11:46 16:05 16:42 17:24 09:53
Thu, 20-Nov 06:09 06:50 07:28 11:46 16:03 16:41 17:23 09:50
Fri, 21-Nov 06:10 06:52 07:30 11:46 16:02 16:40 17:22 09:48
Sat, 22-Nov 06:12 06:53 07:32 11:47 16:01 16:39 17:21 09:45
Sun, 23-Nov 06:13 06:55 07:33 11:47 16:00 16:38 17:20 09:43
Mon, 24-Nov 06:14 06:56 07:35 11:47 15:59 16:38 17:20 09:41
Tue, 25-Nov 06:16 06:58 07:37 11:48 15:58 16:37 17:19 09:38
Wed, 26-Nov 06:17 06:59 07:38 11:48 15:57 16:36 17:18 09:36
Thu, 27-Nov 06:18 07:01 07:40 11:48 15:56 16:35 17:17 09:34
Fri, 28-Nov 06:20 07:02 07:41 11:48 15:55 16:35 17:17 09:32
Sat, 29-Nov 06:21 07:03 07:43 11:49 15:55 16:34 17:16 09:30
Sun, 30-Nov 06:22 07:05 07:44 11:49 15:54 16:33 17:16 09:28
Mon, 01-Dec 06:23 07:06 07:45 11:50 15:53 16:33 17:15 09:26
Tue, 02-Dec 06:25 07:07 07:47 11:50 15:53 16:32 17:15 09:25
Wed, 03-Dec 06:26 07:09 07:48 11:50 15:52 16:32 17:15 09:23
Thu, 04-Dec 06:27 07:10 07:49 11:51 15:52 16:31 17:14 09:21
Fri, 05-Dec 06:28 07:11 07:51 11:51 15:51 16:31 17:14 09:20
Sat, 06-Dec 06:29 07:12 07:52 11:52 15:51 16:31 17:14 09:18
Sun, 07-Dec 06:30 07:13 07:53 11:52 15:51 16:31 17:14 09:17
Mon, 08-Dec 06:31 07:14 07:54 11:52 15:50 16:30 17:14 09:16
Tue, 09-Dec 06:32 07:15 07:56 11:53 15:50 16:30 17:13 09:14
Wed, 10-Dec 06:33 07:16 07:57 11:53 15:50 16:30 17:13 09:13
Thu, 11-Dec 06:34 07:17 07:58 11:54 15:50 16:30 17:13 09:12
Fri, 12-Dec 06:35 07:18 07:59 11:54 15:50 16:30 17:14 09:11
Sat, 13-Dec 06:36 07:19 08:00 11:55 15:50 16:30 17:14 09:11
Sun, 14-Dec 06:37 07:20 08:00 11:55 15:50 16:30 17:14 09:10
Mon, 15-Dec 06:37 07:21 08:01 11:56 15:50 16:31 17:14 09:09
Tue, 16-Dec 06:38 07:22 08:02 11:56 15:50 16:31 17:14 09:09
Wed, 17-Dec 06:39 07:22 08:03 11:57 15:50 16:31 17:15 09:08
Thu, 18-Dec 06:39 07:23 08:04 11:57 15:51 16:31 17:15 09:08
Fri, 19-Dec 06:40 07:24 08:04 11:58 15:51 16:32 17:15 09:08
Sat, 20-Dec 06:41 07:24 08:05 11:58 15:51 16:32 17:16 09:08
Sun, 21-Dec 06:41 07:25 08:05 11:59 15:52 16:33 17:16 09:08
Mon, 22-Dec 06:42 07:25 08:06 11:59 15:52 16:33 17:17 09:08
Tue, 23-Dec 06:42 07:26 08:06 12:00 15:53 16:34 17:17 09:08
Wed, 24-Dec 06:42 07:26 08:07 12:00 15:54 16:34 17:18 09:08
Thu, 25-Dec 06:43 07:26 08:07 12:01 15:54 16:35 17:19 09:08
Fri, 26-Dec 06:43 07:27 08:07 12:01 15:55 16:36 17:19 09:09
Sat, 27-Dec 06:43 07:27 08:07 12:02 15:56 16:37 17:20 09:09
Sun, 28-Dec 06:44 07:27 08:08 12:02 15:57 16:37 17:21 09:10
Mon, 29-Dec 06:44 07:27 08:08 12:03 15:58 16:38 17:22 09:10
Tue, 30-Dec 06:44 07:27 08:08 12:03 15:59 16:39 17:22 09:11
Wed, 31-Dec 06:44 07:27 08:08 12:04 16:00 16:40 17:23 09:12
Thu, 01-Jan 06:44 07:27 08:08 12:04 16:01 16:41 17:24 09:13
Fri, 02-Jan 06:44 07:27 08:07 12:04 16:02 16:42 17:25 09:14
Sat, 03-Jan 06:44 07:27 08:07 12:05 16:03 16:43 17:26 09:15
Sun, 04-Jan 06:44 07:27 08:07 12:05 16:04 16:44 17:27 09:17
Mon, 05-Jan 06:44 07:27 08:07 12:06 16:05 16:45 17:28 09:18
Tue, 06-Jan 06:44 07:26 08:06 12:06 16:07 16:46 17:29 09:19
Wed, 07-Jan 06:43 07:26 08:06 12:07 16:08 16:48 17:30 09:21
Thu, 08-Jan 06:43 07:26 08:06 12:07 16:09 16:49 17:32 09:23
Fri, 09-Jan 06:43 07:25 08:05 12:08 16:11 16:50 17:33 09:24
Sat, 10-Jan 06:42 07:25 08:04 12:08 16:12 16:51 17:34 09:26
Sun, 11-Jan 06:42 07:24 08:04 12:08 16:13 16:53 17:35 09:28
Mon, 12-Jan 06:41 07:24 08:03 12:09 16:15 16:54 17:37 09:30
Tue, 13-Jan 06:41 07:23 08:02 12:09 16:16 16:55 17:38 09:32

Notes

  • Max Height (solar noon) is when the sun is highest in the sky.
  • Day length is dawn to dusk as there is enough light for walking for at least 30 minutes before sunrise and after sunset, even on an overcast day.
  • At 'Light' (nautical dawn) the horizon becomes visible. At 'Dawn' (civil dawn) there is enough light to read, and drivers can switch their lights off. Finally the sun rises.
  • After sunset, there is still enough light to read until 'Dusk' (civil dusk) or lighting up time for drivers. The horizon is still visible until 'Dark' (nautical dusk).
  • Times will vary if there is a hill on the horizon.

Hertfordshire moonlight

Moonlight chart for walking at night.

Night of Sunset Dusk Moon Visible Dawn Sunrise Phase % Full Max. Ht. Night Walk
Fri, 18-Jul 21:09 21:54 23:56 dawn 04:20 05:05 39 % 07:50
Sat, 19-Jul 21:08 21:52 00:17 dawn 04:22 05:06 29 % 08:47
Sun, 20-Jul 21:07 21:51 00:49 dawn 04:24 05:07 19 % 09:48
Mon, 21-Jul 21:06 21:49 01:36 dawn 04:25 05:09 11 % 10:52
Tue, 22-Jul 21:04 21:48 02:43 dawn 04:27 05:10 5 % 11:55
Wed, 23-Jul 21:03 21:46 04:28 05:11 1 %
Thu, 24-Jul 21:02 21:44 04:30 05:13 0 % 12:54
Fri, 25-Jul 21:00 21:43 dusk 21:45 04:32 05:14 2 % 13:49
Sat, 26-Jul 20:59 21:41 dusk 22:00 04:34 05:16 5 % 14:38
Sun, 27-Jul 20:57 21:39 dusk 22:12 04:35 05:17 11 % 15:24
Mon, 28-Jul 20:56 21:38 dusk 22:22 04:37 05:19 18 % 16:06
Tue, 29-Jul 20:54 21:36 dusk 22:31 04:39 05:20 26 % 16:47
Wed, 30-Jul 20:53 21:34 dusk 22:41 04:40 05:22 35 % 17:27
Thu, 31-Jul 20:51 21:32 dusk 22:53 04:42 05:23 45 % 18:08
Fri, 01-Aug 20:49 21:30 dusk 23:07 04:44 05:25 54 % 18:51
Sat, 02-Aug 20:48 21:28 dusk 23:26 04:46 05:26 64 % 19:37
Sun, 03-Aug 20:46 21:26 dusk 23:52 04:48 05:28 72 % 20:26
Mon, 04-Aug 20:44 21:24 dusk 00:30 04:49 05:29 81 % 21:17 after dusk
Tue, 05-Aug 20:42 21:22 dusk 01:24 04:51 05:31 88 % 22:11 after dusk
Wed, 06-Aug 20:41 21:20 dusk 02:32 04:53 05:33 94 % 23:06 after dusk
Thu, 07-Aug 20:39 21:18 dusk 03:52 04:55 05:34 98 % 00:01 after dusk
Fri, 08-Aug 20:37 21:16 dusk dawn 04:57 05:36 100 % 00:53 all night
Sat, 09-Aug 20:35 21:14 dusk dawn 04:58 05:37 99 % 01:43 all night
Sun, 10-Aug 20:33 21:12 dusk dawn 05:00 05:39 97 % 02:31 all night
Mon, 11-Aug 20:31 21:10 21:24 dawn 05:02 05:41 92 % 03:19 before dawn
Tue, 12-Aug 20:29 21:08 21:35 dawn 05:04 05:42 84 % 04:06 before dawn
Wed, 13-Aug 20:27 21:05 21:47 dawn 05:06 05:44 75 % 04:55 before dawn
Thu, 14-Aug 20:25 21:03 22:02 dawn 05:07 05:45 64 % 05:47
Fri, 15-Aug 20:23 21:01 22:22 dawn 05:09 05:47 53 % 06:42
Sat, 16-Aug 20:21 20:59 22:49 dawn 05:11 05:49 42 % 07:41
Sun, 17-Aug 20:19 20:57 23:30 dawn 05:13 05:50 31 % 08:43
Mon, 18-Aug 20:17 20:54 00:28 dawn 05:15 05:52 21 % 09:44
Tue, 19-Aug 20:15 20:52 01:44 dawn 05:16 05:53 12 % 10:44
Wed, 20-Aug 20:13 20:50 03:08 dawn 05:18 05:55 6 % 11:39
Thu, 21-Aug 20:11 20:48 05:20 05:57 2 %
Fri, 22-Aug 20:09 20:45 05:22 05:58 0 % 12:30
Sat, 23-Aug 20:07 20:43 05:24 06:00 1 % 13:17
Sun, 24-Aug 20:05 20:41 05:25 06:01 3 % 14:00
Mon, 25-Aug 20:02 20:38 dusk 20:39 05:27 06:03 7 % 14:42
Tue, 26-Aug 20:00 20:36 dusk 20:49 05:29 06:05 13 % 15:22
Wed, 27-Aug 19:58 20:34 dusk 20:59 05:31 06:06 21 % 16:03
Thu, 28-Aug 19:56 20:31 dusk 21:12 05:32 06:08 29 % 16:46
Fri, 29-Aug 19:54 20:29 dusk 21:29 05:34 06:10 38 % 17:30
Sat, 30-Aug 19:51 20:27 dusk 21:51 05:36 06:11 47 % 18:17
Sun, 31-Aug 19:49 20:24 dusk 22:24 05:38 06:13 57 % 19:07
Mon, 01-Sep 19:47 20:22 dusk 23:10 05:39 06:14 66 % 20:00
Tue, 02-Sep 19:45 20:20 dusk 00:11 05:41 06:16 75 % 20:54 after dusk
Wed, 03-Sep 19:42 20:17 dusk 01:26 05:43 06:18 83 % 21:48 after dusk
Thu, 04-Sep 19:40 20:15 dusk 02:49 05:45 06:19 91 % 22:41 after dusk
Fri, 05-Sep 19:38 20:12 dusk 04:15 05:46 06:21 96 % 23:32 after dusk
Sat, 06-Sep 19:36 20:10 dusk 05:41 05:48 06:22 99 % 00:22 after dusk
Sun, 07-Sep 19:33 20:08 dusk dawn 05:50 06:24 100 % 01:10 all night
Mon, 08-Sep 19:31 20:05 dusk dawn 05:51 06:26 98 % 01:59 all night
Tue, 09-Sep 19:29 20:03 dusk dawn 05:53 06:27 93 % 02:49 all night
Wed, 10-Sep 19:26 20:00 20:09 dawn 05:55 06:29 86 % 03:41 before dawn
Thu, 11-Sep 19:24 19:58 20:27 dawn 05:56 06:31 77 % 04:36 before dawn
Fri, 12-Sep 19:22 19:56 20:52 dawn 05:58 06:32 67 % 05:35
Sat, 13-Sep 19:19 19:53 21:28 dawn 06:00 06:34 56 % 06:37
Sun, 14-Sep 19:17 19:51 22:21 dawn 06:01 06:35 44 % 07:39
Mon, 15-Sep 19:15 19:49 23:31 dawn 06:03 06:37 33 % 08:38
Tue, 16-Sep 19:12 19:46 00:52 dawn 06:05 06:39 24 % 09:34
Wed, 17-Sep 19:10 19:44 02:16 dawn 06:06 06:40 15 % 10:26
Thu, 18-Sep 19:08 19:41 03:38 dawn 06:08 06:42 8 % 11:13
Fri, 19-Sep 19:05 19:39 04:57 dawn 06:10 06:43 4 % 11:56
Sat, 20-Sep 19:03 19:37 06:11 06:45 1 %
Sun, 21-Sep 19:01 19:34 06:13 06:47 0 % 12:38
Mon, 22-Sep 18:58 19:32 06:15 06:48 1 % 13:19
Tue, 23-Sep 18:56 19:30 06:16 06:50 4 % 14:00
Wed, 24-Sep 18:54 19:27 06:18 06:52 9 % 14:41
Thu, 25-Sep 18:51 19:25 dusk 19:34 06:20 06:53 15 % 15:25
Fri, 26-Sep 18:49 19:23 dusk 19:54 06:21 06:55 23 % 16:11
Sat, 27-Sep 18:47 19:20 dusk 20:22 06:23 06:57 31 % 17:00
Sun, 28-Sep 18:45 19:18 dusk 21:02 06:25 06:58 40 % 17:51
Mon, 29-Sep 18:42 19:16 dusk 21:56 06:26 07:00 50 % 18:43
Tue, 30-Sep 18:40 19:13 dusk 23:04 06:28 07:02 60 % 19:36
Wed, 01-Oct 18:38 19:11 dusk 00:22 06:30 07:03 69 % 20:29
Thu, 02-Oct 18:35 19:09 dusk 01:45 06:31 07:05 79 % 21:20 after dusk
Fri, 03-Oct 18:33 19:06 dusk 03:10 06:33 07:07 87 % 22:09 after dusk
Sat, 04-Oct 18:31 19:04 dusk 04:36 06:35 07:08 93 % 22:58 after dusk
Sun, 05-Oct 18:28 19:02 dusk 06:03 06:36 07:10 98 % 23:46 after dusk
Mon, 06-Oct 18:26 19:00 dusk dawn 06:38 07:12 100 % 00:36 all night
Tue, 07-Oct 18:24 18:57 dusk dawn 06:40 07:13 99 % 01:28 all night
Wed, 08-Oct 18:22 18:55 dusk dawn 06:41 07:15 95 % 02:24 all night
Thu, 09-Oct 18:19 18:53 18:53 dawn 06:43 07:17 89 % 03:24 before dawn
Fri, 10-Oct 18:17 18:51 19:26 dawn 06:45 07:18 80 % 04:27 before dawn
Sat, 11-Oct 18:15 18:49 20:14 dawn 06:46 07:20 70 % 05:31
Sun, 12-Oct 18:13 18:47 21:21 dawn 06:48 07:22 59 % 06:33
Mon, 13-Oct 18:11 18:44 22:40 dawn 06:50 07:23 48 % 07:30
Tue, 14-Oct 18:08 18:42 00:04 dawn 06:51 07:25 37 % 08:23
Wed, 15-Oct 18:06 18:40 01:27 dawn 06:53 07:27 27 % 09:11
Thu, 16-Oct 18:04 18:38 02:45 dawn 06:55 07:29 19 % 09:55
Fri, 17-Oct 18:02 18:36 04:01 dawn 06:56 07:30 12 % 10:37
Sat, 18-Oct 18:00 18:34 05:14 dawn 06:58 07:32 6 % 11:17
Sun, 19-Oct 17:58 18:32 06:26 dawn 07:00 07:34 2 % 11:58
Mon, 20-Oct 17:56 18:30 07:01 07:36 0 %
Tue, 21-Oct 17:54 18:28 07:03 07:37 0 % 12:39
Wed, 22-Oct 17:52 18:26 07:05 07:39 2 % 13:22
Thu, 23-Oct 17:50 18:24 07:06 07:41 5 % 14:07
Fri, 24-Oct 17:48 18:22 dusk 18:24 07:08 07:43 10 % 14:55
Sat, 25-Oct 17:46 18:20 dusk 19:00 06:10 06:44 17 % 15:45
Sun, 26-Oct 16:44 17:18 dusk 18:48 06:11 06:46 25 % 15:36
Mon, 27-Oct 16:42 17:17 dusk 19:50 06:13 06:48 34 % 16:29
Tue, 28-Oct 16:40 17:15 dusk 21:03 06:15 06:50 43 % 17:20
Wed, 29-Oct 16:38 17:13 dusk 22:22 06:16 06:52 53 % 18:10
Thu, 30-Oct 16:36 17:11 dusk 23:43 06:18 06:53 64 % 18:59
Fri, 31-Oct 16:34 17:09 dusk 01:06 06:20 06:55 74 % 19:46
Sat, 01-Nov 16:32 17:08 dusk 02:30 06:21 06:57 83 % 20:33 after dusk
Sun, 02-Nov 16:30 17:06 dusk 03:57 06:23 06:59 91 % 21:21 after dusk
Mon, 03-Nov 16:29 17:04 dusk 05:28 06:25 07:00 96 % 22:12 after dusk
Tue, 04-Nov 16:27 17:03 dusk dawn 06:26 07:02 99 % 23:06 all night
Wed, 05-Nov 16:25 17:01 dusk dawn 06:28 07:04 100 % 00:05 all night
Thu, 06-Nov 16:23 17:00 dusk dawn 06:30 07:06 97 % 01:08 all night
Fri, 07-Nov 16:22 16:58 17:03 dawn 06:31 07:08 91 % 02:14 before dawn
Sat, 08-Nov 16:20 16:56 18:04 dawn 06:33 07:09 83 % 03:20 before dawn
Sun, 09-Nov 16:19 16:55 19:22 dawn 06:35 07:11 74 % 04:22
Mon, 10-Nov 16:17 16:54 20:48 dawn 06:36 07:13 63 % 05:18
Tue, 11-Nov 16:15 16:52 22:13 dawn 06:38 07:15 53 % 06:08
Wed, 12-Nov 16:14 16:51 23:34 dawn 06:39 07:16 42 % 06:54
Thu, 13-Nov 16:12 16:49 00:51 dawn 06:41 07:18 32 % 07:37
Fri, 14-Nov 16:11 16:48 02:04 dawn 06:43 07:20 23 % 08:17
Sat, 15-Nov 16:10 16:47 03:16 dawn 06:44 07:22 16 % 08:57
Sun, 16-Nov 16:08 16:46 04:28 dawn 06:46 07:23 9 % 09:38
Mon, 17-Nov 16:07 16:45 05:40 dawn 06:47 07:25 5 % 10:20
Tue, 18-Nov 16:06 16:43 06:49 07:27 2 % 11:04
Wed, 19-Nov 16:05 16:42 06:50 07:28 0 % 11:51
Thu, 20-Nov 16:03 16:41 06:52 07:30 1 %
Fri, 21-Nov 16:02 16:40 06:53 07:32 3 % 12:41
Sat, 22-Nov 16:01 16:39 dusk 16:45 06:55 07:33 7 % 13:32
Sun, 23-Nov 16:00 16:38 dusk 17:43 06:56 07:35 12 % 14:24
Mon, 24-Nov 15:59 16:38 dusk 18:52 06:58 07:37 19 % 15:16
Tue, 25-Nov 15:58 16:37 dusk 20:08 06:59 07:38 28 % 16:06
Wed, 26-Nov 15:57 16:36 dusk 21:27 07:01 07:40 37 % 16:53
Thu, 27-Nov 15:56 16:35 dusk 22:46 07:02 07:41 47 % 17:40
Fri, 28-Nov 15:55 16:35 dusk 00:06 07:03 07:43 58 % 18:25
Sat, 29-Nov 15:55 16:34 dusk 01:28 07:05 07:44 68 % 19:11
Sun, 30-Nov 15:54 16:33 dusk 02:54 07:06 07:45 78 % 19:58 after dusk
Mon, 01-Dec 15:53 16:33 dusk 04:24 07:07 07:47 87 % 20:48 after dusk
Tue, 02-Dec 15:53 16:32 dusk 05:59 07:09 07:48 94 % 21:43 after dusk
Wed, 03-Dec 15:52 16:32 dusk dawn 07:10 07:49 98 % 22:44 all night
Thu, 04-Dec 15:52 16:31 dusk dawn 07:11 07:51 100 % 23:50 all night
Fri, 05-Dec 15:51 16:31 dusk dawn 07:12 07:52 98 % 00:57 all night
Sat, 06-Dec 15:51 16:31 16:54 dawn 07:13 07:53 94 % 02:03 before dawn
Sun, 07-Dec 15:51 16:31 18:21 dawn 07:14 07:54 87 % 03:05 before dawn
Mon, 08-Dec 15:50 16:30 19:50 dawn 07:15 07:56 79 % 03:59 before dawn
Tue, 09-Dec 15:50 16:30 21:16 dawn 07:16 07:57 69 % 04:49
Wed, 10-Dec 15:50 16:30 22:36 dawn 07:17 07:58 59 % 05:34
Thu, 11-Dec 15:50 16:30 23:52 dawn 07:18 07:59 49 % 06:16
Fri, 12-Dec 15:50 16:30 01:05 dawn 07:19 08:00 39 % 06:56
Sat, 13-Dec 15:50 16:30 02:17 dawn 07:20 08:00 30 % 07:37
Sun, 14-Dec 15:50 16:30 03:30 dawn 07:21 08:01 22 % 08:18
Mon, 15-Dec 15:50 16:31 04:43 dawn 07:22 08:02 14 % 09:02
Tue, 16-Dec 15:50 16:31 05:56 dawn 07:22 08:03 8 % 09:48
Wed, 17-Dec 15:50 16:31 07:07 dawn 07:23 08:04 4 % 10:37
Thu, 18-Dec 15:51 16:31 07:24 08:04 1 % 11:28
Fri, 19-Dec 15:51 16:32 07:24 08:05 0 %
Sat, 20-Dec 15:51 16:32 07:25 08:05 1 % 12:20
Sun, 21-Dec 15:52 16:33 dusk 16:43 07:25 08:06 4 % 13:12
Mon, 22-Dec 15:52 16:33 dusk 17:58 07:26 08:06 8 % 14:03
Tue, 23-Dec 15:53 16:34 dusk 19:16 07:26 08:07 14 % 14:51
Wed, 24-Dec 15:54 16:34 dusk 20:35 07:26 08:07 22 % 15:38
Thu, 25-Dec 15:54 16:35 dusk 21:54 07:27 08:07 31 % 16:22
Fri, 26-Dec 15:55 16:36 dusk 23:13 07:27 08:07 41 % 17:07
Sat, 27-Dec 15:56 16:37 dusk 00:34 07:27 08:08 52 % 17:52
Sun, 28-Dec 15:57 16:37 dusk 01:58 07:27 08:08 63 % 18:39
Mon, 29-Dec 15:58 16:38 dusk 03:28 07:27 08:08 74 % 19:30
Tue, 30-Dec 15:59 16:39 dusk 05:01 07:27 08:08 84 % 20:26 after dusk
Wed, 31-Dec 16:00 16:40 dusk 06:31 07:27 08:08 91 % 21:27 after dusk
Thu, 01-Jan 16:01 16:41 dusk dawn 07:27 08:07 97 % 22:33 all night
Fri, 02-Jan 16:02 16:42 dusk dawn 07:27 08:07 100 % 23:40 all night
Sat, 03-Jan 16:03 16:43 dusk dawn 07:27 08:07 99 % 00:44 all night
Sun, 04-Jan 16:04 16:44 17:16 dawn 07:27 08:07 96 % 01:43 before dawn
Mon, 05-Jan 16:05 16:45 18:46 dawn 07:26 08:06 91 % 02:37 before dawn
Tue, 06-Jan 16:07 16:46 20:12 dawn 07:26 08:06 84 % 03:25 before dawn
Wed, 07-Jan 16:08 16:48 21:32 dawn 07:26 08:06 76 % 04:09 before dawn
Thu, 08-Jan 16:09 16:49 22:49 dawn 07:25 08:05 66 % 04:52
Fri, 09-Jan 16:11 16:50 00:03 dawn 07:25 08:04 57 % 05:33
Sat, 10-Jan 16:12 16:51 01:16 dawn 07:24 08:04 47 % 06:15
Sun, 11-Jan 16:13 16:53 02:29 dawn 07:24 08:03 37 % 06:58
Mon, 12-Jan 16:15 16:54 03:43 dawn 07:23 08:02 29 % 07:43
Tue, 13-Jan 16:16 16:55 04:55 dawn 07:23 08:02 21 % 08:31

Notes

  • The percentage of the moon which is illuminated doesn't vary much with location.
  • A full moon is not just bigger, it is much brighter. A quarter moon (1/2 disk visible) give less than 5% of the illumination of a full moon. You can walk with a quarter moon if its high in the sky (after dusk for a growing moon, before dawn for a shrinking moon).
  • Sky glow (light reflected by air or clouds) from nearby cities, and especially snow on the ground also effect light levels.
  • Times will vary a few minutes, as (i) these figures are for the centre of the county the walk is in, (ii) if there are hills on the horizon, and (iii) if you are on a hill
  • Sunlight is ~ 1,000,000 times brighter than moonlight.
  • Of course, you need a cloudless night as well!

Hertfordshire weather (Accuweather)

Now would be a good time for a cup of tea.