Annual mean 12°C · wettest around March · prevailing wind SW
Warmest
28.0 °C
Coldest
-0.3 °C
Wettest
45%
Windiest
5.7 m/s
Prevailing
SW
4.4 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 12°C. July is the hottest month, with highs of about 28°C; January is the coldest, with lows of about -3°C. London has no sharply defined rainy season: the chance of rain on a given day runs from 40% in August, the driest month, to 46% in March, the wettest. Winds in London are highest in March, averaging 4.2 m/s (15 km/h), and lightest in August, at 2.3 m/s (8 km/h). The prevailing wind is from the SW. The clearest skies in London come in July, when the sky is typically 37% covered; January is the cloudiest month, at 69%.
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
1°C
-3°C
-5°C
43%
69%
4.0 m/s
0
0
6
February
4°C
-1°C
-2°C
44%
58%
4.0 m/s
2
0
15
March
9°C
3°C
4°C
46%
54%
4.2 m/s
10
0
32
April
15°C
7°C
10°C
45%
51%
3.9 m/s
31
2
55
May
21°C
14°C
18°C
44%
49%
3.3 m/s
59
19
58
June
26°C
19°C
25°C
42%
39%
3.1 m/s
61
44
32
July
28°C
21°C
28°C
44%
37%
2.5 m/s
39
65
11
August
27°C
19°C
27°C
40%
40%
2.3 m/s
48
58
19
September
24°C
15°C
24°C
40%
37%
2.3 m/s
62
42
40
October
18°C
9°C
15°C
42%
45%
2.9 m/s
45
10
63
November
9°C
3°C
4°C
43%
49%
3.5 m/s
10
0
35
December
4°C
-0°C
-1°C
44%
62%
3.7 m/s
0
0
14
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 1°C at their warmest in January, its coolest month, and 28°C in July, its warmest; the coolest hours of the day run from -3°C to 21°C through the year, and the average temperature over the year is 12°C around the clock. Rain is most likely around March and least likely around August. 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 3°CLow -1°CRain 44%
Winter in London has typical daily highs of about 3°C and lows of about -1°C, with a 44% chance of rain on a given day.
London weather in springMarch to May
High 15°CLow 8°CRain 45%
Spring in London has typical daily highs of about 15°C and lows of about 8°C, with a 45% chance of rain on a given day.
London weather in summerJune to August
High 27°CLow 19°CRain 42%
Summer in London has typical daily highs of about 27°C and lows of about 19°C, with a 42% chance of rain on a given day.
London weather in autumnSeptember to November
High 17°CLow 9°CRain 42%
Autumn in London has typical daily highs of about 17°C and lows of about 9°C, with a 42% 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 40% in August, the driest month, to 46% in March, the wettest.
What time of year is London windiest?
Winds in London are highest in March, averaging 4.2 m/s (15 km/h), and lightest in August, at 2.3 m/s (8 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 28°C; January is the coldest, with lows of about -3°C.