Annual mean 9°C · wettest around December · prevailing wind W
Warmest
25.6 °C
Coldest
-3.6 °C
Wettest
29%
Windiest
3.5 m/s
Prevailing
W
2.8 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
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 9°C. July is the hottest month, with highs of about 25°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 14% in July, the driest month, to 28% in December, the wettest. Winds in London are highest in February, averaging 2.7 m/s (10 km/h), and lightest in July, at 1.7 m/s (6 km/h). The prevailing wind is from the W. The clearest skies in London come in September, when the sky is typically 45% covered; December is the cloudiest month, at 74%.
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
-3°C
-5°C
-8°C
27%
72%
2.6 m/s
0
0
1
February
-1°C
-4°C
-6°C
24%
65%
2.7 m/s
0
0
5
March
4°C
-1°C
-1°C
22%
58%
2.7 m/s
1
0
14
April
10°C
4°C
5°C
24%
57%
2.6 m/s
12
0
40
May
17°C
10°C
14°C
18%
51%
2.3 m/s
43
11
63
June
23°C
16°C
22°C
15%
47%
2.1 m/s
68
31
52
July
25°C
18°C
26°C
14%
45%
1.7 m/s
59
55
27
August
24°C
17°C
25°C
14%
45%
1.7 m/s
65
51
31
September
21°C
14°C
21°C
14%
45%
1.8 m/s
69
25
60
October
14°C
8°C
12°C
22%
53%
2.2 m/s
34
4
61
November
6°C
2°C
2°C
24%
62%
2.4 m/s
5
0
23
December
1°C
-1°C
-4°C
28%
74%
2.6 m/s
0
0
4
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 -3°C at their warmest in January, its coolest month, and 25°C in July, its warmest; the coolest hours of the day run from -5°C to 18°C through the year, and the average temperature over the year is 9°C around the clock. Rain is most likely around December and least likely around July. 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 -1°CLow -4°CRain 26%
Winter in London has typical daily highs of about -1°C and lows of about -4°C, with a 26% chance of rain on a given day.
London weather in springMarch to May
High 10°CLow 4°CRain 21%
Spring in London has typical daily highs of about 10°C and lows of about 4°C, with a 21% chance of rain on a given day.
London weather in summerJune to August
High 24°CLow 17°CRain 14%
Summer in London has typical daily highs of about 24°C and lows of about 17°C, with a 14% chance of rain on a given day.
London weather in autumnSeptember to November
High 14°CLow 8°CRain 20%
Autumn in London has typical daily highs of about 14°C and lows of about 8°C, with a 20% 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 14% in July, the driest month, to 28% in December, the wettest.
What time of year is London windiest?
Winds in London are highest in February, averaging 2.7 m/s (10 km/h), and lightest in July, at 1.7 m/s (6 km/h). The prevailing wind is from the W.
What is the average temperature in London year round?
The average temperature in London over the whole year is 9°C. July is the hottest month, with highs of about 25°C; January is the coldest, with lows of about -5°C.