S
M
T
W
T
F
S
28
79°
64°
29
87°
62°
30
89°
67°
1
95°
74°
2
95°
74°
3
95°
75°
4
93°
68°
5
84°
67°
6
81°
68°
7
79°
66°
8
82°
67°
9
86°
68°
10
80°
67°
11
84°
59°
12
83°
60°
13
87°
62°
14
92°
65°
15
90°
63°
16
89°
64°
17
86°
62°
18
82°
61°
19
80°
60°
20
79°
58°
21
80°
61°
22
82°
61°
23
81°
60°
24
86°
64°
25
85°
63°
26
85°
63°
27
86°
64°
28
85°
64°
29
85°
63°
30
83°
63°
31
79°
60°
1
78°
61°
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 78° to 92°, with overnight lows between 58° and 67°. The average high for July is 84° with an average low of 62°. 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.
