S
M
T
W
T
F
S
30
70°
43°
31
69°
42°
1
68°
42°
2
69°
45°
3
69°
46°
4
68°
47°
5
67°
45°
6
68°
44°
7
65°
43°
8
66°
41°
9
65°
41°
10
67°
46°
11
66°
42°
12
66°
40°
13
69°
40°
14
69°
46°
15
68°
47°
16
65°
39°
17
64°
39°
18
71°
40°
19
71°
46°
20
70°
46°
21
70°
45°
22
68°
43°
23
69°
38°
24
63°
36°
25
61°
42°
26
65°
35°
27
66°
34°
28
57°
33°
29
56°
34°
30
59°
41°
1
59°
33°
2
Hist. Avg.
62°
40°
3
Hist. Avg.
62°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Colebrook
Colebrook's September 2026 forecast shows daily high temperatures ranging from 56° to 71°, with overnight lows between 33° and 47°. The average high for September is 66° with an average low of 41°. 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 Colebrook. See also: October | November | December.
