S
M
T
W
T
F
S
26
86°
61°
27
86°
63°
28
73°
63°
29
77°
57°
30
82°
57°
31
88°
61°
1
81°
68°
2
72°
66°
3
79°
54°
4
84°
52°
5
84°
55°
6
84°
68°
7
84°
66°
8
88°
63°
9
82°
57°
10
82°
66°
11
82°
63°
12
82°
63°
13
81°
59°
14
82°
61°
15
81°
57°
16
84°
68°
17
77°
57°
18
81°
55°
19
77°
57°
20
79°
55°
21
81°
48°
22
75°
61°
23
73°
55°
24
69°
53°
25
76°
56°
26
80°
60°
27
79°
57°
28
74°
50°
29
75°
57°
30
79°
64°
31
75°
56°
1
75°
56°
2
71°
54°
3
74°
53°
4
75°
52°
5
74°
53°
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 69° to 80°, with overnight lows between 50° and 64°. The average high for August is 75° with an average low of 55°. 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.
