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