S
M
T
W
T
F
S
26
95°
72°
27
94°
73°
28
92°
76°
29
89°
67°
30
88°
64°
31
79°
67°
1
78°
70°
2
80°
65°
3
87°
61°
4
88°
63°
5
88°
61°
6
82°
69°
7
88°
71°
8
88°
69°
9
89°
65°
10
92°
74°
11
93°
72°
12
95°
75°
13
97°
75°
14
97°
74°
15
99°
74°
16
102°
75°
17
91°
72°
18
92°
68°
19
94°
69°
20
94°
69°
21
94°
68°
22
92°
67°
23
91°
65°
24
87°
67°
25
88°
69°
26
91°
70°
27
91°
70°
28
90°
69°
29
86°
68°
30
81°
68°
31
81°
67°
1
82°
67°
2
83°
68°
3
88°
68°
4
87°
67°
5
88°
68°
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 81° to 102°, with overnight lows between 65° and 75°. The average high for August is 91° with an average low of 70°. 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.
