S
M
T
W
T
F
S
26
84°
65°
27
95°
67°
28
91°
72°
29
85°
61°
30
N/A
1
58°
46°
2
72°
49°
3
76°
56°
4
84°
64°
5
93°
58°
6
82°
54°
7
77°
53°
8
78°
58°
9
79°
58°
10
84°
61°
11
86°
59°
12
85°
60°
13
86°
60°
14
85°
58°
15
87°
64°
16
87°
63°
17
86°
64°
18
86°
64°
19
87°
63°
20
87°
64°
21
85°
64°
22
86°
63°
23
85°
65°
24
88°
65°
25
84°
61°
26
79°
57°
27
80°
58°
28
81°
65°
29
81°
63°
30
83°
66°
31
83°
65°
1
84°
65°
2
87°
67°
3
90°
67°
4
90°
66°
5
83°
67°
6
85°
66°
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 58° to 93°, with overnight lows between 46° and 67°. The average high for May is 83° with an average low of 61°. 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.