S
M
T
W
T
F
S
26
97°
76°
27
95°
81°
28
88°
77°
29
86°
72°
30
84°
70°
31
80°
64°
1
83°
65°
2
83°
64°
3
85°
66°
4
87°
66°
5
79°
64°
6
86°
71°
7
90°
70°
8
93°
70°
9
88°
69°
10
88°
70°
11
92°
71°
12
86°
62°
13
79°
61°
14
80°
66°
15
80°
69°
16
87°
70°
17
86°
68°
18
81°
64°
19
80°
64°
20
82°
68°
21
82°
67°
22
80°
62°
23
78°
62°
24
78°
59°
25
77°
58°
26
77°
60°
27
78°
62°
28
81°
66°
29
84°
67°
30
77°
67°
31
78°
66°
1
85°
65°
2
83°
61°
3
78°
65°
4
85°
66°
5
85°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Des Moines
Des Moines's August 2026 forecast shows daily high temperatures ranging from 77° to 93°, with overnight lows between 58° and 71°. The average high for August is 83° with an average low of 66°. 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 Des Moines. See also: September | October | November.
