S
M
T
W
T
F
S
26
87°
70°
27
84°
63°
28
85°
64°
29
85°
70°
30
88°
66°
31
88°
69°
1
92°
65°
2
87°
65°
3
86°
64°
4
83°
63°
5
84°
64°
6
83°
63°
7
84°
63°
8
84°
64°
9
85°
69°
10
85°
67°
11
86°
69°
12
89°
69°
13
90°
70°
14
91°
63°
15
91°
63°
16
84°
64°
17
84°
68°
18
90°
63°
19
88°
62°
20
84°
61°
21
84°
61°
22
86°
62°
23
85°
64°
24
89°
67°
25
90°
66°
26
91°
62°
27
84°
63°
28
83°
60°
29
83°
66°
30
86°
66°
31
89°
67°
1
89°
65°
2
88°
65°
3
84°
64°
4
85°
63°
5
81°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in St. Peters
St. Peters's August 2026 forecast shows daily high temperatures ranging from 81° to 92°, with overnight lows between 60° and 70°. The average high for August is 86° with an average low of 65°. 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. Peters. See also: September | October | November.
