S
M
T
W
T
F
S
30
74°
35°
31
72°
34°
1
70°
38°
2
71°
37°
3
74°
38°
4
71°
35°
5
65°
32°
6
65°
36°
7
69°
31°
8
65°
34°
9
64°
31°
10
63°
34°
11
64°
27°
12
63°
30°
13
63°
29°
14
64°
34°
15
65°
35°
16
66°
29°
17
62°
26°
18
61°
27°
19
62°
28°
20
62°
27°
21
63°
29°
22
66°
29°
23
67°
34°
24
66°
32°
25
Hist. Avg.
68°
30°
26
Hist. Avg.
67°
30°
27
Hist. Avg.
67°
29°
28
Hist. Avg.
67°
29°
29
Hist. Avg.
66°
28°
30
Hist. Avg.
66°
28°
1
Hist. Avg.
66°
27°
2
Hist. Avg.
65°
27°
3
Hist. Avg.
65°
26°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Crested Butte
Crested Butte's September 2026 forecast shows daily high temperatures ranging from 61° to 74°, with overnight lows between 26° and 38°. The average high for September is 66° with an average low of 32°. 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.
