S
M
T
W
T
F
S
30
77°
51°
31
67°
48°
1
69°
43°
2
70°
46°
3
71°
42°
4
71°
44°
5
72°
45°
6
72°
47°
7
72°
46°
8
74°
43°
9
69°
44°
10
69°
40°
11
68°
39°
12
70°
39°
13
69°
38°
14
67°
32°
15
69°
36°
16
70°
36°
17
70°
35°
18
69°
36°
19
68°
36°
20
68°
33°
21
67°
34°
22
68°
35°
23
68°
35°
24
67°
34°
25
66°
33°
26
66°
34°
27
62°
32°
28
65°
33°
29
63°
32°
30
58°
32°
1
58°
31°
2
59°
27°
3
60°
30°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Crested Butte
Crested Butte's September 2026 forecast shows daily high temperatures ranging from 58° to 74°, with overnight lows between 27° and 47°. The average high for September is 67° with an average low of 37°. 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 Crested Butte. See also: October | November | December.
