7 Day Forecast for Hertfordshire
Moon: 14% (dusk to 19:39)
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Met Office Forecast
A rather unsettled and breezy period, with spells of rain.
This Evening and Tonight:
Breezy with cloud slowly thickening but staying dry this evening. A band of rain will spread eastwards later in the night, followed by outbreaks of light drizzle in western parts by dawn. Minimum Temperature 10C.
Early drizzle clearing north-eastwards, then dry with large sunny spells developing. Slightly cloudier in the afternoon, with perhaps the odd shower in western parts. Remaining breezy. Maximum Temperature 18C.
Outlook for Wednesday to Friday:
Cloudy with rain on Wednesday, locally heavy in the morning. Rather dull on Thursday, with patchy rain and showers. Cloud thickening after a sunny morning on Friday, becoming breezy.
Day 6-7 and Week 2:
Rather unsettled conditions are expected to dominate the period, with outbreaks of rain and blustery showers in many parts of the UK, though the extent of which is low at this time. The focus for the heaviest and most frequent rain is across western areas, whilst rather windy conditions particularly in the northwest at times may pose a risk of gales or even severe gales mainly around coastal areas. Intermittent brighter and drier spells may also last for a time in all parts of the UK, with most of the more settled conditions perhaps most likely in eastern and south-eastern parts. Overall, temperatures looking to be generally close to or a little below normal for the time of year.
Week 3 and 4:
Confidence is low for this period, but the generally unsettled wet and windy theme is expected to gradually transition to a more settled picture through early November, especially in the south of the UK. Elsewhere, showery and windier conditions may remain more prevalent in the north. Temperatures may dip slightly below normal in the more settled periods, allowing for an increasing likelihood of overnight frost and fog developing.
Met Office : East England : 2020-10-19T13:14:09
Daylight : Hertfordshire
Day length is dusk to dawn. Times will vary a little if there is a hill on the horizon.
It should still be light enough to read at dawn and dusk, so there will be enough light for walking even earlier (later).
Moonlight : Hertfordshire
- The moon's phase or fracillum (percentage of the moon illuminated) doesn't vary much with location.
- A full moon is not just bigger, its much brighter. A half moon ('50%') give less than 5% of the illumination of a full moon. You can walk with a half 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
- Of course, you need a cloudless night as well!