S
M
T
W
T
F
S
26
45°
36°
27
44°
35°
28
52°
37°
29
41°
34°
30
38°
31°
1
44°
30°
2
55°
39°
3
61°
47°
4
51°
27°
5
42°
28°
6
41°
29°
7
45°
32°
8
49°
34°
9
54°
34°
10
51°
35°
11
55°
38°
12
56°
38°
13
53°
39°
14
52°
41°
15
59°
38°
16
58°
44°
17
59°
42°
18
60°
45°
19
59°
45°
20
59°
41°
21
54°
36°
22
54°
37°
23
56°
40°
24
54°
39°
25
55°
38°
26
55°
39°
27
56°
39°
28
55°
38°
29
57°
46°
30
58°
47°
31
60°
48°
1
65°
48°
2
67°
50°
3
69°
49°
4
65°
50°
5
69°
51°
6
68°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in London
London's May 2026 forecast shows daily high temperatures ranging from 41° to 69°, with overnight lows between 27° and 51°. The average high for May is 57° with an average low of 41°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in London. See also: June | July | August.