S
M
T
W
T
F
S
26
102°
65°
27
97°
61°
28
97°
62°
29
96°
62°
30
97°
64°
31
98°
63°
1
99°
62°
2
96°
58°
3
93°
59°
4
88°
56°
5
89°
58°
6
92°
56°
7
89°
58°
8
90°
62°
9
91°
63°
10
91°
62°
11
91°
62°
12
88°
60°
13
82°
60°
14
90°
62°
15
90°
60°
16
86°
61°
17
89°
60°
18
89°
60°
19
88°
59°
20
89°
60°
21
90°
61°
22
90°
58°
23
89°
59°
24
88°
59°
25
87°
58°
26
87°
57°
27
83°
57°
28
84°
56°
29
85°
56°
30
85°
55°
31
84°
55°
1
79°
54°
2
81°
54°
3
82°
54°
4
78°
54°
5
81°
53°
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 78° to 102°, with overnight lows between 53° and 65°. The average high for August is 89° 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.
