S
M
T
W
T
F
S
27
73°
50°
28
N/A
29
71°
56°
30
80°
50°
1
86°
50°
2
85°
53°
3
65°
57°
4
69°
56°
5
71°
44°
6
67°
37°
7
80°
37°
8
76°
47°
9
75°
39°
10
63°
44°
11
59°
55°
12
74°
50°
13
86°
47°
14
88°
59°
15
68°
58°
16
85°
57°
17
58°
36°
18
62°
32°
19
66°
30°
20
69°
31°
21
67°
32°
22
69°
33°
23
62°
34°
24
63°
34°
25
66°
32°
26
73°
32°
27
75°
37°
28
66°
39°
29
78°
40°
30
70°
32°
31
58°
40°
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 58° to 70°, with overnight lows between 32° and 40°. The average high for October is 64° with an average low of 36°. 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.
