S
M
T
W
T
F
S
26
80°
54°
27
82°
54°
28
79°
53°
29
76°
57°
30
75°
59°
31
74°
54°
1
75°
53°
2
75°
53°
3
76°
58°
4
77°
61°
5
83°
61°
6
83°
59°
7
82°
61°
8
83°
54°
9
74°
56°
10
76°
57°
11
77°
55°
12
78°
54°
13
76°
60°
14
82°
58°
15
83°
55°
16
83°
55°
17
82°
60°
18
82°
58°
19
74°
61°
20
73°
50°
21
72°
55°
22
74°
55°
23
76°
57°
24
79°
52°
25
81°
53°
26
81°
58°
27
74°
54°
28
70°
52°
29
70°
51°
30
72°
52°
31
75°
55°
1
72°
56°
2
70°
52°
3
72°
53°
4
71°
51°
5
72°
62°
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 70° to 83°, with overnight lows between 50° and 62°. The average high for August is 77° with an average low of 56°. 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.
