Daily Data Tables - Day Maximum (09-21) / °C · Max (all years)
Day
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
1
15.3
13.9
14.4
18.5
28.7
26.4
34.2
32.8
27.4
27.1
16.9
14.0
2
12.8
13.0
15.9
18.6
24.1
27.1
29.5
30.1
25.8
26.6
16.9
14.8
3
12.0
13.1
14.0
18.9
20.8
26.9
27.6
32.2
25.7
25.3
17.4
13.6
4
13.6
13.3
12.1
21.2
20.2
27.8
28.3
28.5
28.3
20.4
18.1
12.3
5
13.2
13.0
17.9
21.7
22.2
26.8
30.1
28.2
28.7
20.6
17.2
13.7
6
12.2
13.8
16.9
22.4
24.6
23.3
32.4
31.6
30.6
20.5
17.3
14.0
7
12.4
11.4
17.0
20.9
27.8
25.1
32.4
35.1
30.5
23.9
16.8
14.1
8
11.9
12.3
16.8
26.1
26.8
25.3
34.2
31.9
29.7
23.9
16.0
14.2
9
14.8
12.6
19.3
25.2
24.8
26.8
34.8
31.7
31.7
23.5
16.6
14.3
10
13.5
11.4
15.7
21.8
23.6
29.9
31.2
33.7
30.4
22.7
16.3
13.7
11
11.1
12.0
16.9
24.8
24.0
31.3
31.8
33.4
25.1
21.8
16.0
11.8
12
12.5
11.1
14.9
24.9
25.5
28.8
30.5
33.9
25.8
20.9
16.3
13.2
13
13.3
11.7
16.7
20.8
24.0
29.3
30.3
33.2
32.2
23.8
16.9
13.5
14
12.9
13.3
16.6
21.8
23.4
28.3
29.3
32.2
27.3
19.6
14.1
14.6
15
11.2
16.9
17.2
24.2
22.6
27.9
30.1
29.8
29.1
19.0
16.5
12.9
16
12.3
14.7
18.3
19.6
24.4
29.1
30.2
25.9
26.1
22.1
13.9
15.0
17
10.6
14.3
15.4
19.8
25.9
31.9
31.2
27.6
24.8
18.7
15.7
15.2
18
11.9
14.9
18.5
24.9
24.5
31.8
36.8
30.0
24.2
19.5
15.2
14.0
19
11.7
13.0
17.2
28.4
26.2
31.9
39.1
29.5
26.8
19.7
14.0
16.0
20
10.3
17.1
19.6
25.9
27.4
30.3
31.7
24.9
23.9
17.7
13.8
13.0
21
12.4
14.7
16.7
24.4
27.4
33.0
29.9
26.0
22.9
18.1
15.0
13.6
22
11.6
14.8
19.6
25.6
28.6
28.6
32.7
30.0
24.4
17.9
15.6
14.9
23
12.7
16.0
19.5
26.5
30.2
33.9
32.6
29.6
20.7
18.7
13.5
12.8
24
12.8
15.8
18.8
22.7
31.9
35.7
32.2
32.2
22.5
18.4
17.8
14.8
25
13.5
17.5
17.2
22.4
33.2
31.9
36.8
31.9
21.4
18.3
13.2
14.3
26
11.5
18.1
17.8
20.8
35.2
35.8
33.9
32.0
23.8
19.1
13.2
14.9
27
13.3
16.9
18.2
21.5
27.1
31.9
31.8
31.7
23.6
19.8
13.7
14.5
28
12.9
14.2
20.8
22.9
31.7
30.6
29.5
28.2
24.9
18.2
13.2
13.7
29
13.5
12.6
19.3
22.2
26.1
33.6
34.1
25.3
26.9
21.3
13.7
14.6
30
12.4
23.6
25.5
30.1
33.2
31.0
25.8
27.4
17.8
13.5
14.5
31
13.3
21.1
26.7
36.2
25.4
21.3
14.7
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Lowest
10.3
11.1
12.1
18.5
20.2
23.3
27.6
24.9
20.7
17.7
13.2
11.8
Highest
15.3
18.1
23.6
28.4
35.2
35.8
39.1
35.1
32.2
27.1
18.1
16.0
Mean
12.6
14.0
17.5
22.8
26.4
29.8
32.1
30.1
26.4
20.8
15.5
14.0
Cumul
12.6
13.3
14.7
16.7
18.7
20.5
22.2
23.2
23.6
23.3
22.6
21.9
Day Maximum (09-21) in London, NW3 — calendar-day maximum across all years from 2009 onwards along with monthly summary: lowest, highest, mean, and the cumulative value for the year to the month's end.
Highest air temperature during the daytime window 09:00 to 21:00 local time.