S
M
T
W
T
F
S
26
82°
66°
27
81°
65°
28
81°
61°
29
82°
67°
30
87°
68°
31
87°
67°
1
82°
64°
2
86°
68°
3
83°
58°
4
80°
62°
5
82°
63°
6
81°
60°
7
82°
59°
8
81°
58°
9
83°
62°
10
83°
65°
11
84°
60°
12
82°
59°
13
80°
57°
14
80°
58°
15
81°
61°
16
80°
60°
17
79°
58°
18
79°
56°
19
80°
57°
20
80°
62°
21
81°
65°
22
84°
66°
23
87°
66°
24
87°
64°
25
86°
58°
26
82°
57°
27
80°
57°
28
81°
63°
29
84°
56°
30
79°
55°
31
79°
55°
1
78°
59°
2
77°
59°
3
78°
55°
4
77°
54°
5
76°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Cedar Rapids
Cedar Rapids's August 2026 forecast shows daily high temperatures ranging from 76° to 87°, with overnight lows between 54° and 68°. The average high for August is 82° with an average low of 61°. 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 Cedar Rapids. See also: September | October | November.