Annual mean 12°C · wettest around December · prevailing wind SW
Warmest
22.7 °C
Coldest
6.3 °C
Wettest
23%
Windiest
5.0 m/s
Prevailing
SW
4.2 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in London over the whole year is 12°C. July is the hottest month, with highs of about 22°C; January is the coldest, with lows of about 5°C. London has no sharply defined rainy season: the chance of rain on a given day runs from 12% in April, the driest month, to 22% in December, the wettest. Winds in London are highest in February, averaging 4.1 m/s (15 km/h), and lightest in September, at 3.2 m/s (12 km/h). The prevailing wind is from the SW. The clearest skies in London come in April, when the sky is typically 40% covered; December is the cloudiest month, at 63%.
Month by month London climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
7°C
5°C
3°C
19%
58%
3.6 m/s
0
0
20
February
9°C
6°C
4°C
20%
57%
4.1 m/s
1
0
30
March
11°C
6°C
6°C
19%
56%
3.9 m/s
4
0
42
April
13°C
7°C
9°C
12%
40%
3.5 m/s
14
1
63
May
17°C
11°C
14°C
16%
42%
3.4 m/s
44
2
81
June
20°C
15°C
18°C
14%
42%
3.5 m/s
69
13
74
July
22°C
16°C
20°C
15%
41%
3.5 m/s
78
17
68
August
22°C
16°C
20°C
14%
41%
3.4 m/s
79
14
71
September
19°C
14°C
17°C
16%
44%
3.2 m/s
66
6
80
October
15°C
11°C
12°C
21%
50%
3.3 m/s
28
0
82
November
10°C
8°C
7°C
19%
56%
3.4 m/s
3
0
52
December
8°C
6°C
4°C
22%
63%
3.7 m/s
1
0
32
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short London weather by season
Year round, London has days of about 7°C at their warmest in January, its coolest month, and 22°C in July, its warmest; the coolest hours of the day run from 5°C to 16°C through the year, and the average temperature over the year is 12°C around the clock. Rain is most likely around December and least likely around April. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
London weather in winterDecember to February
High 8°CLow 6°CRain 20%
Winter in London has typical daily highs of about 8°C and lows of about 6°C, with a 20% chance of rain on a given day.
London weather in springMarch to May
High 14°CLow 8°CRain 16%
Spring in London has typical daily highs of about 14°C and lows of about 8°C, with a 16% chance of rain on a given day.
London weather in summerJune to August
High 21°CLow 16°CRain 14%
Summer in London has typical daily highs of about 21°C and lows of about 16°C, with a 14% chance of rain on a given day.
London weather in autumnSeptember to November
High 15°CLow 11°CRain 19%
Autumn in London has typical daily highs of about 15°C and lows of about 11°C, with a 19% chance of rain on a given day.
When is the rainy season in London?
London has no sharply defined rainy season: the chance of rain on a given day runs from 12% in April, the driest month, to 22% in December, the wettest.
What time of year is London windiest?
Winds in London are highest in February, averaging 4.1 m/s (15 km/h), and lightest in September, at 3.2 m/s (12 km/h). The prevailing wind is from the SW.
What is the average temperature in London year round?
The average temperature in London over the whole year is 12°C. July is the hottest month, with highs of about 22°C; January is the coldest, with lows of about 5°C.