Monthly Data Tables - Day Maximum (09-21) / °C
Monthly Mean Day Maximum (09-21)
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Year
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Year
Lowest
3.6
5.5
6.0
12.0
15.8
19.0
21.0
20.5
17.4
13.3
8.2
3.0
13.6
Highest
9.3
11.4
13.6
18.8
21.3
24.9
28.6
27.3
23.2
17.4
12.8
13.0
18.7
Mean
7.2
8.6
11.4
15.1
18.4
21.9
23.9
22.9
19.7
15.4
10.8
8.5
15.4
Day Maximum (09-21): monthly means for all months since 2009 in London, NW3. Data for Day Maximum (09-21) begins in 1881.
Highest air temperature during the daytime window 09:00 to 21:00 local time.