S
M
T
W
T
F
S
26
98°
75°
27
98°
75°
28
91°
76°
29
87°
68°
30
87°
63°
31
80°
70°
1
77°
65°
2
83°
64°
3
83°
63°
4
85°
67°
5
88°
69°
6
83°
70°
7
86°
71°
8
89°
70°
9
93°
69°
10
91°
69°
11
92°
69°
12
89°
67°
13
89°
69°
14
88°
64°
15
82°
63°
16
83°
67°
17
92°
72°
18
91°
72°
19
93°
71°
20
92°
70°
21
91°
70°
22
91°
71°
23
90°
70°
24
89°
70°
25
87°
69°
26
89°
69°
27
89°
68°
28
90°
67°
29
90°
68°
30
89°
67°
31
89°
67°
1
90°
68°
2
90°
68°
3
89°
67°
4
88°
66°
5
88°
67°
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 77° to 93°, with overnight lows between 63° and 72°. The average high for August is 88° 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. Peters. See also: September | October | November.
