S
M
T
W
T
F
S
29
45°
36°
30
47°
35°
1
46°
34°
2
46°
34°
3
44°
33°
4
42°
33°
5
44°
32°
6
44°
32°
7
38°
29°
8
35°
27°
9
33°
28°
10
34°
28°
11
37°
30°
12
37°
30°
13
35°
29°
14
32°
22°
15
34°
23°
16
33°
24°
17
35°
26°
18
36°
27°
19
39°
21°
20
35°
20°
21
32°
20°
22
33°
22°
23
29°
23°
24
33°
23°
25
32°
21°
26
31°
11°
27
29°
10°
28
29°
7°
29
28°
11°
30
26°
20°
31
29°
20°
1
35°
15°
2
31°
16°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in London
London's December 2026 forecast shows daily high temperatures ranging from 26° to 47°, with overnight lows between 7° and 36°. The average high for December is 36° with an average low of 24°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in London. See also: January | February | March.
