S
M
T
W
T
F
S
26
88°
61°
27
87°
60°
28
89°
59°
29
87°
61°
30
86°
55°
31
85°
55°
1
87°
56°
2
91°
61°
3
95°
60°
4
95°
62°
5
94°
62°
6
96°
60°
7
95°
62°
8
94°
61°
9
93°
56°
10
92°
54°
11
90°
53°
12
88°
53°
13
89°
54°
14
89°
54°
15
87°
53°
16
86°
54°
17
85°
53°
18
84°
54°
19
85°
53°
20
85°
51°
21
84°
54°
22
84°
51°
23
83°
49°
24
84°
49°
25
84°
48°
26
83°
49°
27
85°
48°
28
90°
49°
29
89°
54°
30
89°
53°
31
88°
54°
1
86°
48°
2
79°
47°
3
80°
48°
4
81°
47°
5
81°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Gunnison
Gunnison's August 2026 forecast shows daily high temperatures ranging from 79° to 96°, with overnight lows between 47° and 62°. The average high for August is 87° with an average low of 54°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Gunnison. See also: September | October | November.