S
M
T
W
T
F
S
26
93°
71°
27
94°
72°
28
94°
72°
29
93°
71°
30
93°
72°
31
92°
71°
1
94°
72°
2
95°
73°
3
95°
73°
4
94°
72°
5
95°
72°
6
95°
74°
7
94°
72°
8
93°
71°
9
92°
71°
10
92°
70°
11
94°
72°
12
94°
73°
13
93°
73°
14
95°
72°
15
94°
71°
16
93°
69°
17
92°
67°
18
90°
69°
19
92°
66°
20
89°
67°
21
92°
68°
22
91°
67°
23
86°
62°
24
84°
62°
25
84°
61°
26
85°
60°
27
84°
60°
28
84°
59°
29
85°
60°
30
86°
66°
31
90°
66°
1
87°
65°
2
90°
65°
3
90°
64°
4
89°
64°
5
86°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in St. Clair
St. Clair's August 2026 forecast shows daily high temperatures ranging from 84° to 95°, with overnight lows between 59° and 74°. The average high for August is 91° with an average low of 68°. 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.
