S
M
T
W
T
F
S
26
83°
56°
27
86°
62°
28
73°
64°
29
78°
65°
30
81°
65°
31
87°
60°
1
86°
61°
2
82°
71°
3
82°
62°
4
85°
56°
5
84°
61°
6
89°
71°
7
90°
68°
8
86°
68°
9
90°
66°
10
85°
62°
11
83°
68°
12
86°
65°
13
86°
66°
14
86°
64°
15
84°
59°
16
69°
60°
17
87°
64°
18
N/A
19
86°
67°
20
77°
58°
21
84°
60°
22
78°
63°
23
77°
60°
24
78°
58°
25
78°
61°
26
77°
62°
27
77°
60°
28
75°
61°
29
76°
61°
30
78°
60°
31
78°
60°
1
77°
59°
2
75°
56°
3
74°
61°
4
78°
58°
5
73°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in St. Clair
St. Clair's August 2026 forecast shows daily high temperatures ranging from 73° to 86°, with overnight lows between 56° and 67°. The average high for August is 78° with an average low of 60°. 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 St. Clair. See also: September | October | November.
