S
M
T
W
T
F
S
29
47°
33°
30
46°
38°
1
48°
36°
2
48°
35°
3
45°
36°
4
46°
33°
5
45°
29°
6
45°
29°
7
46°
31°
8
44°
31°
9
44°
32°
10
46°
29°
11
45°
31°
12
45°
31°
13
46°
32°
14
45°
33°
15
46°
30°
16
48°
29°
17
44°
29°
18
44°
31°
19
45°
31°
20
44°
29°
21
44°
29°
22
45°
31°
23
45°
31°
24
44°
33°
25
44°
32°
26
45°
30°
27
46°
32°
28
42°
37°
29
48°
39°
30
49°
35°
31
50°
36°
1
Hist. Avg.
44°
37°
2
Hist. Avg.
44°
37°
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 42° to 50°, with overnight lows between 29° and 39°. The average high for December is 46° with an average low of 32°. 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.
