S
M
T
W
T
F
S
28
59°
48°
29
61°
52°
30
60°
50°
1
57°
48°
2
59°
48°
3
55°
47°
4
62°
49°
5
61°
51°
6
57°
50°
7
60°
47°
8
59°
49°
9
58°
47°
10
59°
49°
11
59°
50°
12
60°
51°
13
62°
52°
14
61°
52°
15
62°
51°
16
63°
52°
17
63°
51°
18
62°
52°
19
59°
49°
20
58°
49°
21
58°
48°
22
59°
48°
23
62°
49°
24
62°
49°
25
59°
50°
26
59°
49°
27
58°
48°
28
58°
49°
29
59°
49°
30
59°
48°
31
61°
48°
1
61°
51°
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 57° to 63°, with overnight lows between 47° and 52°. The average high for July is 60° with an average low of 50°. 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.
