S
M
T
W
T
F
S
30
80°
69°
31
89°
73°
1
93°
70°
2
93°
72°
3
94°
73°
4
93°
72°
5
91°
72°
6
80°
67°
7
81°
64°
8
88°
67°
9
81°
65°
10
80°
59°
11
81°
55°
12
79°
55°
13
62°
53°
14
72°
54°
15
72°
62°
16
68°
62°
17
77°
65°
18
75°
64°
19
74°
64°
20
69°
59°
21
61°
54°
22
62°
51°
23
67°
49°
24
68°
55°
25
66°
54°
26
62°
57°
27
66°
53°
28
71°
54°
29
68°
59°
30
74°
65°
1
74°
58°
2
72°
56°
3
72°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cedar Rapids
Cedar Rapids's September 2026 forecast shows daily high temperatures ranging from 62° to 74°, with overnight lows between 53° and 65°. The average high for September is 69° with an average low of 57°. 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 Cedar Rapids. See also: October | November | December.
