S
M
T
W
T
F
S
26
81°
62°
27
84°
66°
28
84°
66°
29
79°
65°
30
84°
62°
31
79°
59°
1
78°
60°
2
78°
60°
3
79°
63°
4
81°
66°
5
84°
65°
6
79°
62°
7
83°
64°
8
85°
65°
9
85°
64°
10
84°
58°
11
80°
57°
12
81°
60°
13
79°
58°
14
81°
58°
15
79°
59°
16
79°
62°
17
77°
63°
18
78°
58°
19
78°
57°
20
79°
57°
21
79°
58°
22
82°
63°
23
81°
62°
24
83°
62°
25
83°
55°
26
82°
54°
27
76°
54°
28
76°
56°
29
75°
59°
30
76°
60°
31
75°
61°
1
81°
57°
2
76°
57°
3
78°
55°
4
76°
54°
5
75°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in South Windham
South Windham's August 2026 forecast shows daily high temperatures ranging from 75° to 85°, with overnight lows between 54° and 66°. The average high for August is 80° with an average low of 60°. 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 South Windham. See also: September | October | November.