S
M
T
W
T
F
S
26
86°
71°
27
87°
66°
28
86°
65°
29
88°
69°
30
87°
68°
31
89°
71°
1
90°
71°
2
89°
68°
3
87°
67°
4
84°
65°
5
85°
66°
6
85°
65°
7
86°
65°
8
86°
66°
9
87°
69°
10
90°
68°
11
87°
70°
12
89°
70°
13
90°
69°
14
92°
70°
15
92°
66°
16
91°
64°
17
88°
66°
18
90°
68°
19
90°
63°
20
85°
62°
21
84°
62°
22
86°
64°
23
85°
63°
24
91°
66°
25
90°
67°
26
91°
67°
27
91°
64°
28
84°
61°
29
84°
67°
30
89°
66°
31
88°
66°
1
89°
65°
2
88°
66°
3
88°
65°
4
87°
65°
5
84°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Cape Girardeau
Cape Girardeau's August 2026 forecast shows daily high temperatures ranging from 84° to 92°, with overnight lows between 61° and 71°. The average high for August is 88° 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 Cape Girardeau. See also: September | October | November.
