S
M
T
W
T
F
S
30
80°
56°
31
80°
59°
1
79°
57°
2
80°
58°
3
78°
59°
4
79°
58°
5
78°
58°
6
77°
57°
7
76°
57°
8
76°
56°
9
75°
56°
10
76°
55°
11
77°
55°
12
77°
54°
13
76°
56°
14
76°
55°
15
73°
56°
16
75°
53°
17
73°
53°
18
68°
51°
19
69°
43°
20
64°
44°
21
65°
52°
22
66°
43°
23
64°
43°
24
63°
44°
25
65°
49°
26
68°
48°
27
63°
46°
28
62°
42°
29
62°
41°
30
63°
41°
1
65°
45°
2
66°
49°
3
62°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Crotched Mountain
Crotched Mountain's September 2026 forecast shows daily high temperatures ranging from 62° to 80°, with overnight lows between 41° and 59°. The average high for September is 71° with an average low of 51°. 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 Crotched Mountain. See also: October | November | December.