S
M
T
W
T
F
S
28
80°
69°
29
85°
65°
30
93°
67°
1
100°
73°
2
102°
78°
3
103°
81°
4
101°
74°
5
92°
75°
6
86°
73°
7
80°
71°
8
82°
68°
9
89°
70°
10
90°
74°
11
91°
73°
12
84°
68°
13
83°
64°
14
91°
66°
15
99°
75°
16
98°
72°
17
94°
73°
18
84°
73°
19
86°
69°
20
86°
69°
21
87°
67°
22
85°
66°
23
86°
65°
24
84°
65°
25
84°
66°
26
85°
67°
27
85°
66°
28
84°
67°
29
89°
66°
30
83°
69°
31
87°
70°
1
89°
68°
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 99°, with overnight lows between 65° and 75°. The average high for July is 88° with an average low of 69°. 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.
