S
M
T
W
T
F
S
26
101°
66°
27
97°
61°
28
97°
66°
29
96°
66°
30
95°
64°
31
98°
63°
1
99°
62°
2
92°
58°
3
87°
56°
4
86°
56°
5
85°
58°
6
89°
59°
7
91°
62°
8
90°
62°
9
91°
63°
10
92°
62°
11
90°
62°
12
90°
61°
13
91°
62°
14
89°
61°
15
89°
61°
16
86°
60°
17
89°
61°
18
89°
60°
19
88°
61°
20
89°
60°
21
87°
59°
22
89°
58°
23
89°
59°
24
88°
58°
25
85°
58°
26
87°
57°
27
86°
58°
28
82°
57°
29
79°
56°
30
87°
57°
31
85°
56°
1
76°
55°
2
75°
53°
3
77°
54°
4
81°
51°
5
81°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Casper
Casper's August 2026 forecast shows daily high temperatures ranging from 75° to 101°, with overnight lows between 51° and 66°. The average high for August is 88° with an average low of 59°. 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 Casper. See also: September | October | November.
