S
M
T
W
T
F
S
30
66°
43°
31
66°
44°
1
68°
46°
2
69°
52°
3
71°
51°
4
69°
52°
5
65°
53°
6
75°
49°
7
73°
46°
8
65°
42°
9
65°
42°
10
69°
44°
11
70°
48°
12
69°
47°
13
62°
49°
14
71°
49°
15
73°
48°
16
71°
50°
17
67°
51°
18
66°
50°
19
69°
48°
20
68°
46°
21
68°
43°
22
67°
39°
23
59°
42°
24
57°
42°
25
58°
41°
26
58°
36°
27
56°
36°
28
57°
41°
29
57°
37°
30
55°
36°
1
55°
36°
2
53°
34°
3
52°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Chesuncook
Chesuncook's September 2026 forecast shows daily high temperatures ranging from 52° to 75°, with overnight lows between 34° and 53°. The average high for September is 65° with an average low of 44°. 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 Chesuncook. See also: October | November | December.
