S
M
T
W
T
F
S
30
86°
67°
31
82°
66°
1
80°
61°
2
77°
63°
3
78°
62°
4
76°
62°
5
75°
64°
6
76°
64°
7
84°
65°
8
83°
64°
9
84°
65°
10
85°
65°
11
85°
63°
12
79°
60°
13
79°
60°
14
78°
61°
15
82°
62°
16
83°
63°
17
83°
60°
18
72°
53°
19
71°
56°
20
79°
59°
21
76°
56°
22
80°
59°
23
77°
53°
24
68°
56°
25
71°
50°
26
69°
50°
27
72°
56°
28
75°
57°
29
71°
57°
30
74°
56°
1
75°
50°
2
68°
55°
3
76°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Des Moines
Des Moines's September 2026 forecast shows daily high temperatures ranging from 68° to 86°, with overnight lows between 50° and 67°. The average high for September is 77° 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 September weather will actually feel in Des Moines. See also: October | November | December.
