S
M
T
W
T
F
S
26
55°
40°
27
52°
41°
28
53°
41°
29
54°
42°
30
59°
43°
1
55°
43°
2
57°
40°
3
56°
37°
4
56°
41°
5
60°
45°
6
65°
45°
7
57°
44°
8
58°
45°
9
62°
46°
10
58°
46°
11
66°
47°
12
66°
47°
13
67°
48°
14
67°
49°
15
63°
40°
16
62°
40°
17
62°
41°
18
65°
43°
19
63°
43°
20
68°
42°
21
62°
49°
22
70°
50°
23
70°
51°
24
71°
51°
25
70°
50°
26
65°
47°
27
69°
47°
28
71°
48°
29
68°
48°
30
67°
49°
31
72°
50°
1
73°
53°
2
71°
54°
3
74°
53°
4
75°
54°
5
76°
53°
6
74°
54°
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 52° to 76°, with overnight lows between 37° and 54°. The average high for May is 64° with an average low of 46°. 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.