S
M
T
W
T
F
S
30
69°
48°
31
72°
54°
1
73°
55°
2
75°
53°
3
69°
50°
4
68°
46°
5
67°
45°
6
67°
45°
7
69°
52°
8
73°
46°
9
66°
44°
10
67°
44°
11
68°
40°
12
64°
42°
13
65°
42°
14
62°
41°
15
64°
42°
16
65°
41°
17
64°
41°
18
68°
42°
19
63°
40°
20
63°
38°
21
62°
39°
22
62°
39°
23
65°
43°
24
69°
39°
25
69°
44°
26
68°
46°
27
62°
43°
28
60°
40°
29
66°
39°
30
64°
36°
1
59°
41°
2
65°
46°
3
65°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in East Windham
East Windham's September 2026 forecast shows daily high temperatures ranging from 59° to 75°, with overnight lows between 35° and 55°. The average high for September is 66° with an average low of 43°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in East Windham. See also: October | November | December.