S
M
T
W
T
F
S
26
66°
36°
27
70°
39°
28
59°
43°
29
66°
41°
30
72°
50°
1
75°
50°
2
70°
43°
3
64°
52°
4
59°
48°
5
61°
43°
6
59°
37°
7
63°
36°
8
64°
45°
9
68°
43°
10
57°
30°
11
55°
27°
12
61°
30°
13
55°
39°
14
57°
36°
15
57°
32°
16
57°
32°
17
61°
41°
18
55°
46°
19
63°
50°
20
66°
48°
21
73°
48°
22
81°
55°
23
81°
54°
24
87°
56°
25
91°
60°
26
92°
57°
27
80°
52°
28
83°
56°
29
83°
53°
30
76°
49°
31
77°
55°
1
75°
55°
2
73°
54°
3
69°
52°
4
68°
50°
5
67°
51°
6
61°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Thatcham
Thatcham's May 2026 forecast shows daily high temperatures ranging from 61° to 92°, with overnight lows between 46° and 60°. The average high for May is 77° with an average low of 53°. 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 Thatcham. See also: June | July | August.