Henley Circular via Great Wood walk

Met Office Forecast

South East England

Frosty start. Rain, sleet and snow from west later.

Today:

Frosty start with fog patches slowly clearing, bright elsewhere with sunny spells. Soon turning cloudy with outbreaks of rain, sleet and snow spreading across the region, perhaps giving significant accumulations in places. Cold throughout. Maximum Temperature 4C.

Tonight:

Cloudy with the band of rain, sleet or snow clearing south during the evening. Staying cold and becoming dry and clear leading to fog patches and a widespread frost. Minimum Temperature -5C.

Monday:

A cold and frosty morning with bright or sunny spells, overnight fog only slowly clearing. Staying bright into the afternoon, but still cold and perhaps becoming breezy across Kent later. Maximum Temperature 5C.

Outlook for Tuesday to Thursday:

Cold and frosty start Tuesday with fog slow to clear, rain pushing into west later. Occasionally heavy rain and milder temperatures sweeping eastwards through Wednesday, Wet, windy but milder Thursday.

Day 6-7 and Week 2:

Unsettled conditions look likely to dominate for this period, with low pressure across the UK. Therefore, this should, bring changeable weather to most of the country, with periods of rain, showers, and strong winds at times. While mild westerly and southwesterly winds are expected to be dominant for most of the period, occasional colder northerly winds are possible, bringing a chance of snowfall, likely confined to the far northern parts. Towards the end of the period, we may see high pressure bringing a higher than average chance of cold weather more widely with wintry outbreaks. However, there is a chance of drier than average conditions, which would bring an increased risk of frost and fog.

Week 3 and 4:

Confidence is low for this period, but current signals indicate a possible high pressure system around or near the UK during this period. This would likely bring cold northerly winds, producing colder than average temperatures and wintry outbreaks. The second half of February is likely to have a mixture of weather types, with periods of wet, windy and milder weather interspersed with drier, calmer, colder periods.

Met Office : South East England : 2021-01-24T03:19:50

Daylight : Oxfordshire

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 : Oxfordshire

Notes

• 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!