S
M
T
W
T
F
S
27
51°
41°
28
49°
41°
29
49°
42°
30
50°
39°
1
49°
45°
2
54°
46°
3
55°
45°
4
54°
45°
5
50°
44°
6
50°
45°
7
48°
43°
8
49°
44°
9
47°
42°
10
52°
40°
11
47°
41°
12
46°
39°
13
47°
39°
14
50°
41°
15
50°
42°
16
Hist. Avg.
49°
38°
17
Hist. Avg.
49°
38°
18
Hist. Avg.
48°
38°
19
Hist. Avg.
48°
37°
20
Hist. Avg.
48°
37°
21
Hist. Avg.
47°
37°
22
Hist. Avg.
47°
36°
23
Hist. Avg.
47°
36°
24
Hist. Avg.
46°
36°
25
Hist. Avg.
46°
36°
26
Hist. Avg.
46°
35°
27
Hist. Avg.
46°
35°
28
Hist. Avg.
45°
35°
29
Hist. Avg.
45°
35°
30
Hist. Avg.
44°
34°
31
Hist. Avg.
44°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
October Weather in Petersburg
Petersburg's October 2026 forecast shows daily high temperatures ranging from 46° to 55°, with overnight lows between 39° and 46°. The average high for October is 50° with an average low of 42°. 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.
