S
M
T
W
T
F
S
30
83°
47°
31
85°
48°
1
87°
48°
2
88°
49°
3
88°
51°
4
87°
53°
5
88°
53°
6
87°
51°
7
86°
52°
8
86°
50°
9
79°
45°
10
78°
48°
11
77°
49°
12
78°
48°
13
77°
52°
14
81°
50°
15
78°
49°
16
83°
49°
17
76°
40°
18
78°
44°
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 76° to 88°, with overnight lows between 40° and 53°. The average high for September is 83° 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.
