S
M
T
W
T
F
S
27
62°
57°
28
65°
57°
29
70°
59°
30
74°
61°
1
81°
61°
2
78°
57°
3
68°
46°
4
60°
48°
5
65°
50°
6
62°
38°
7
70°
38°
8
70°
46°
9
70°
42°
10
68°
42°
11
57°
53°
12
69°
55°
13
83°
51°
14
75°
61°
15
66°
51°
16
77°
54°
17
54°
37°
18
61°
30°
19
68°
31°
20
68°
34°
21
66°
32°
22
66°
41°
23
61°
35°
24
62°
34°
25
64°
38°
26
67°
40°
27
63°
41°
28
57°
36°
29
55°
37°
30
56°
35°
31
51°
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 51° to 67°, with overnight lows between 32° and 41°. The average high for October is 61° with an average low of 37°. 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.
