S
M
T
W
T
F
S
28
89°
69°
29
90°
75°
30
91°
76°
1
90°
75°
2
92°
73°
3
92°
72°
4
89°
70°
5
84°
70°
6
83°
68°
7
86°
67°
8
88°
66°
9
89°
70°
10
88°
68°
11
84°
67°
12
87°
62°
13
91°
66°
14
89°
67°
15
90°
70°
16
89°
73°
17
91°
72°
18
89°
67°
19
86°
67°
20
86°
67°
21
85°
65°
22
84°
64°
23
86°
67°
24
90°
71°
25
89°
71°
26
91°
70°
27
91°
71°
28
90°
70°
29
89°
70°
30
86°
69°
31
83°
67°
1
83°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Petersburg
Petersburg's July 2026 forecast shows daily high temperatures ranging from 83° to 91°, with overnight lows between 62° and 73°. The average high for July 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 July weather will actually feel in Petersburg. See also: August | September | October.
