S
M
T
W
T
F
S
26
75°
51°
27
75°
52°
28
76°
52°
29
76°
53°
30
80°
54°
31
81°
58°
1
82°
58°
2
82°
57°
3
83°
58°
4
83°
57°
5
82°
50°
6
75°
51°
7
73°
50°
8
75°
50°
9
76°
52°
10
78°
51°
11
80°
56°
12
81°
55°
13
80°
56°
14
79°
57°
15
79°
57°
16
81°
54°
17
81°
55°
18
76°
50°
19
72°
49°
20
74°
49°
21
74°
55°
22
73°
55°
23
72°
53°
24
73°
51°
25
78°
55°
26
78°
51°
27
77°
46°
28
75°
52°
29
72°
54°
30
75°
53°
31
78°
54°
1
77°
53°
2
76°
52°
3
77°
49°
4
76°
44°
5
76°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Windham
Windham's August 2026 forecast shows daily high temperatures ranging from 72° to 83°, with overnight lows between 44° and 58°. The average high for August 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 August weather will actually feel in Windham. See also: September | October | November.