S
M
T
W
T
F
S
30
70°
43°
31
75°
45°
1
76°
46°
2
67°
47°
3
73°
56°
4
74°
55°
5
71°
50°
6
69°
43°
7
74°
54°
8
71°
42°
9
66°
61°
10
74°
50°
11
64°
42°
12
71°
50°
13
72°
51°
14
70°
48°
15
66°
50°
16
68°
46°
17
66°
43°
18
66°
44°
19
65°
46°
20
63°
42°
21
60°
46°
22
60°
46°
23
65°
45°
24
68°
44°
25
68°
45°
26
66°
42°
27
60°
37°
28
64°
40°
29
67°
44°
30
68°
44°
1
68°
43°
2
67°
44°
3
63°
42°
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 60° to 74°, with overnight lows between 37° and 61°. The average high for September is 67° with an average low of 46°. 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.
