ASTRONOMY WEATHER FORECAST
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 London

This forecast is updated at 7am, 1pm and 7pm

Issued by Weather Consultancy Services on:
Monday 12 January 2026 18:00 hrs
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UK & Ireland Weather Summary for Monday
A warm front affecting southern areas on Tuesday, with a wave tracking northeast through central and southern England in the afternoon. A cold front from northwest England through Wales and southwest England at midday, edging east. A trough affecting western Scotland as a weak ridge of high pressure builds into Ireland.

Forecast for astronomy in London for the next 5-days
 Data based on GFS model updated: Mon 12 January 2026 18:00
Time SFC Wind Rain * Total cloud Low cloud Med cloud High cloud Temp Sfc RH Pressure Seeing Clarity
6pm MondaySW 8g25mph0.1mm100%100%93.3%93.3%10C81%1003mb30
9pm MondaySW 7g24mph0mm5%0.4%0%0%10C83%1004mb35
00:01am TuesdaySW 6g21mph0mm100%100%0%0%9C89%1006mb20
3am TuesdayS 3g14mph0mm100%100%100%100%9C89%1006mb10
6am TuesdayS 4g19mph0mm100%7.7%100%100%9C93%1006mb20
9am TuesdayS 4g23mph0.6mm100%100%100%100%9C97%1005mb20
Midday TuesdaySW 4g32mph3.8mm100%100%100%100%10C92%1003mb00
6pm TuesdayNW 4g18mph4mm100%100%100%100%10C94%1004mb20
00:01am WednesdayW 3g14mph0.9mm100%100%100%100%6C82%1010mb40
6am WednesdaySW 3g2mph0.1mm0%0%0%0%4C85%1012mb45
Midday WednesdayS 3g4mph0mm71.2%0.3%5%5%6C68%1014mbN/A2
00:01am ThursdayS 7g21mph0.9mm60%60%50.5%50.5%6C92%1008mb43
Midday ThursdaySW 1g27mph3.9mm100%100%100%100%7C92%1004mb00
00:01am FridayNW 5g26mph3.7mm100%100%0%0%9C86%991mb20
Midday FridayS 5g23mph0.1mm89.4%6.4%38.2%38.2%9C80%1006mb31
00:01am SaturdaySE 3g17mph0.1mm100%86.2%74.5%74.5%7C93%1009mb30
Midday SaturdayE 3g12mph0.2mm100%100%100%100%8C91%1012mb30
00:01am SundayNW 2g4mph0mm58.6%56.3%30.1%30.1%6C86%1013mb43
[* rainfall is previous 6-hours. Gusts are over open ground.]


Planning outlook:
Tuesday low pressure and a cold front will move south across England and Wales with high pressure north west of Scotland. A colder day as rain and snow spreads south. Mainly dry in the channel with sunny spells. Visibilities will be good in the channel but moderate to poor elsewhere in rain and snow.
Wednesday a cell of high pressure is centered west of Ireland and will be ridging east. A cold, windy day with sunny spells and scattered showers of rain and snow. Visibilities will be good but moderate in rain showers, poor in snow showers.
Thursday sees high pressure centred south of Ireland and this will give much of the country a dry, settled, day with sunny spells. Visibilities will be good.
Friday a cold front spreads rain down across Scotland, the Irish Sea and northern England. Fair and dry in the south and in the channel with varying cloud and sunny spells. Visibilities will be good in the south and in the channel, but falling to moderate or locally poor as the rain sets in across the north.
Saturday high pressure to the west of Britain is ridging into Scotland with a front into the far north west. Most areas will be fair and dry with sunny spells today after some patchy mist clears. Visibilities will be good but moderate at first.
Sunday a front moves south east across Britain. Outbreaks of rain will clear western areas in the afternoon. Visibilities will be moderate improving to good as the front clears.



Synoptic charts based on data from 0001 GMT, Monday 12 January 2026 (Updated daily by 9am)
Tomorrow (Day 2)

Day after tomorrow (Day 3)
This forecast is for planning purposes only.
Forecast is copyright Weather Consultancy Services.