S
M
T
W
T
F
S
27
76°
57°
28
79°
58°
29
76°
61°
30
84°
57°
1
88°
56°
2
91°
59°
3
75°
57°
4
67°
58°
5
75°
56°
6
69°
42°
7
75°
39°
8
84°
52°
9
77°
54°
10
73°
53°
11
76°
65°
12
78°
56°
13
85°
52°
14
91°
61°
15
75°
64°
16
87°
63°
17
63°
45°
18
61°
36°
19
66°
35°
20
73°
42°
21
67°
40°
22
69°
39°
23
67°
40°
24
66°
43°
25
70°
34°
26
71°
39°
27
74°
44°
28
70°
47°
29
73°
46°
30
77°
47°
31
72°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Petersburg
Petersburg's October 2026 forecast shows daily high temperatures ranging from 70° to 77°, with overnight lows between 34° and 48°. The average high for October is 72° with an average low of 44°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in Petersburg. See also: November | December | January.
