Westbury to Warminster via Imber Range walk

Met Office Forecast

South West England

A frosty start to Wednesday but clouding over later on.

Today:

After frost and patchy fog clears, Wednesday will be a rather cloudy and murky day. There may be some bright spells at times, most likely towards the evening. A milder day than of late. Maximum Temperature 9C.

Tonight:

There is a continued risk of mist or isolated fog patches overnight, however, with plenty of cloud cover it will be milder than recent nights. Minimum Temperature 3C.

Thursday:

There may be some patchy fog lingering in the morning, however this will clear to leave a dry but cloudy day on Thursday. Rather mild. Maximum Temperature 9C.

Outlook for Friday to Sunday:

Cold with sunny spells Friday with the odd spot of rain possible. Mainly cloudy through Saturday with some brighter breaks a times. Turning unsettled Sunday with some squally showers.

Day 6-7 and Week 2:

Sunday will turn more unsettled for most, with bands of rain moving southeast across the UK, accompanied by a strengthening wind. Heavy showers behind fronts could also bring some wintry precipitation to the hills of the north. Next week looks likely to remain unsettled, with Atlantic fronts making their way southeastwards across the UK. The north and west are likely to see the wettest and windiest spells, with the occasional risk of snow on higher ground. The south and east should stay slightly more settled, though there will still likely be some wet and windy periods. Any settled spells between fronts will lead to some brighter conditions and isolated overnight frosts, but these will likely be short-lived. Temperatures generally around average in the north and just above in the south.

Week 3 and 4:

Through the first half of this period, the mobile wet and windy regime looks set to continue. It seems probable that the most unsettled conditions will gradually transfer further north, leaving a more traditional northwest/southeast split. There are signs that through the middle of February, that a more settled, anticyclonic pattern will begin to affect the southeast. These settled conditions may gradually move further northwest to influence much of the UK for a time. This would bring drier weather for all, with an increased likelihood of fog and frost. Unsettled spells of strong winds and rain are still likely from time to time, but mainly in the northwest. Temperatures are likely to be around normal, with a large diurnal variation, if the more settled regime was to take control.

Met Office : South West England : 2020-01-22T02:46:22

Daylight : Wiltshire

Data: US Navy Observatory

Moonlight : Wiltshire

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, and, (ii) if there are hills on the horizon.
• Of course, you need a cloudless night as well!
• Data: US Navy Observatory