S
M
T
W
T
F
S
29
44°
32°
30
44°
33°
1
45°
32°
2
44°
32°
3
45°
37°
4
50°
38°
5
51°
39°
6
51°
40°
7
50°
38°
8
50°
36°
9
46°
32°
10
44°
30°
11
42°
30°
12
46°
37°
13
49°
34°
14
46°
34°
15
44°
37°
16
49°
35°
17
49°
33°
18
45°
34°
19
49°
37°
20
48°
32°
21
42°
29°
22
41°
29°
23
41°
30°
24
42°
31°
25
47°
36°
26
46°
31°
27
43°
31°
28
49°
39°
29
50°
39°
30
51°
38°
31
51°
36°
1
50°
30°
2
48°
29°
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 41° to 51°, with overnight lows between 29° and 40°. The average high for December is 47° with an average low of 34°. 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.
