S
M
T
W
T
F
S
30
78°
50°
31
70°
53°
1
74°
51°
2
73°
50°
3
69°
55°
4
72°
60°
5
61°
56°
6
58°
52°
7
62°
52°
8
64°
45°
9
65°
53°
10
75°
54°
11
68°
47°
12
69°
46°
13
73°
53°
14
74°
47°
15
73°
51°
16
72°
50°
17
71°
47°
18
67°
47°
19
67°
44°
20
65°
44°
21
69°
43°
22
63°
48°
23
66°
47°
24
69°
46°
25
65°
47°
26
67°
45°
27
60°
44°
28
61°
45°
29
68°
46°
30
68°
45°
1
67°
45°
2
67°
44°
3
66°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Coldbrook
Coldbrook's September 2026 forecast shows daily high temperatures ranging from 60° to 75°, with overnight lows between 43° and 54°. The average high for September is 68° with an average low of 47°. 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 Coldbrook. See also: October | November | December.
