S
M
T
W
T
F
S
30
89°
53°
31
88°
54°
1
86°
48°
2
79°
47°
3
80°
48°
4
81°
47°
5
81°
48°
6
84°
48°
7
87°
52°
8
87°
52°
9
86°
51°
10
86°
50°
11
82°
51°
12
85°
50°
13
86°
51°
14
84°
48°
15
82°
47°
16
81°
48°
17
80°
46°
18
79°
47°
19
Hist. Avg.
76°
46°
20
Hist. Avg.
75°
46°
21
Hist. Avg.
75°
45°
22
Hist. Avg.
74°
45°
23
Hist. Avg.
74°
45°
24
Hist. Avg.
74°
44°
25
Hist. Avg.
73°
44°
26
Hist. Avg.
73°
44°
27
Hist. Avg.
72°
43°
28
Hist. Avg.
72°
43°
29
Hist. Avg.
72°
42°
30
Hist. Avg.
71°
42°
1
Hist. Avg.
71°
42°
2
Hist. Avg.
70°
41°
3
Hist. Avg.
70°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Gunnison
Gunnison's September 2026 forecast shows daily high temperatures ranging from 79° to 89°, with overnight lows between 46° and 54°. The average high for September is 84° with an average low of 49°. 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 Gunnison. See also: October | November | December.
