S
M
T
W
T
F
S
26
67°
40°
27
75°
39°
28
64°
44°
29
58°
44°
30
49°
32°
1
46°
32°
2
44°
29°
3
47°
34°
4
53°
41°
5
55°
45°
6
56°
41°
7
55°
41°
8
53°
40°
9
52°
42°
10
55°
40°
11
54°
38°
12
58°
41°
13
58°
38°
14
59°
36°
15
57°
36°
16
56°
37°
17
56°
36°
18
58°
37°
19
64°
42°
20
61°
39°
21
59°
37°
22
59°
38°
23
60°
37°
24
61°
41°
25
64°
47°
26
66°
41°
27
60°
40°
28
61°
40°
29
64°
45°
30
71°
48°
31
71°
46°
1
70°
48°
2
72°
51°
3
73°
51°
4
74°
50°
5
72°
44°
6
65°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Windham
Windham's May 2026 forecast shows daily high temperatures ranging from 44° to 74°, with overnight lows between 29° and 51°. The average high for May is 60° 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 Windham. See also: June | July | August.