S
M
T
W
T
F
S
26
66°
45°
27
70°
46°
28
63°
46°
29
64°
46°
30
70°
52°
1
75°
46°
2
72°
50°
3
66°
54°
4
61°
54°
5
61°
52°
6
57°
46°
7
61°
45°
8
66°
46°
9
70°
46°
10
55°
41°
11
55°
36°
12
61°
37°
13
55°
45°
14
57°
43°
15
57°
43°
16
59°
51°
17
63°
46°
18
62°
53°
19
67°
56°
20
71°
55°
21
75°
56°
22
78°
60°
23
78°
56°
24
77°
59°
25
76°
56°
26
71°
53°
27
70°
53°
28
71°
54°
29
60°
43°
30
65°
46°
31
62°
47°
1
61°
44°
2
62°
44°
3
64°
48°
4
66°
51°
5
68°
52°
6
69°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Richmond upon Thames
Richmond upon Thames's May 2026 forecast shows daily high temperatures ranging from 59° to 78°, with overnight lows between 43° and 60°. The average high for May is 68° with an average low of 52°. 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 Richmond upon Thames. See also: June | July | August.