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London weather in September

Weather in London: September

Average day temperature: 68.0°F
Average night temperature: 56.4°F
Sea water temperature: 63.4°F
Number of sunny days: 9 days
Day length: 11.7 - 13.6 hours
Number of rainy days: 2 days
Precipitation totals: 1.5 in.

Air temperature in September, °F

Show year:
2024
2023
2022

The highest day temperature during September of 2024 was 77°F. At the same time the lowest night temperature was 45°F. Day and night temperature averages during September were 65.5°F and 56.4°F.

Sea water temperature in London in September, °F

Show year:
2024
2023
2022

The average sea water temperature in September of 2024 was 64.2°F. The highest and lowest sea temperatures during the month were 66.7°F and 61.3°F.

Sunny, partly cloudy and cloudy days

Number of sunny, partly cloudy and cloudy days in September is almost equal.

Precipitation total in September, in.

Precipitation total value in London in September is 1.6 in. Other months of the year show relatively similar values.

Wind speed in September, mph

The average wind speed value in September is 8.6 mph It makes September lest windy month of the year.

Average sunny hours

This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in September is: 6.1.

Best time for vacation in London

Sunniest months:
September 9 days
July 8 days
April 8 days
Warmest months:
July 73.2 °F
August 72.7 °F
June 69.2 °F
Warmest sea temp:
August 66.4 °F
July 64.7 °F
September 63.4 °F
Coldest months:
January 44.8 °F
February 47.2 °F
December 47.3 °F
Rainiest months:
November 5 days
December 5 days
August 4 days
Windiest months:
February 11.3 mph
December 10.9 mph
January 10.4 mph

London on a weather map

London
+39°F
S 6 mph
Feels like: +36°F
Precip.: 0%
Places in United Kingdom:
Name
°F
+37°F
+37°F
+37°F
+39°F
+39°F
+61°F
+36°F
+37°F
+39°F
+39°F
+37°F
+37°F
+37°F
+34°F
+37°F
24 Hours Forecast
London
Local time: 15:22
November 21, thursday
1800
37°F
SE
7 mph
2100
36°F
E
9 mph
November 22, friday
0000
37°F
E
9 mph
0300
36°F
E
12 mph
0600
36°F
E
15 mph
0900
39°F
E
14 mph
1200
43°F
E
14 mph
1500
43°F
E
11 mph
Units of measurement: °C / °F