S
M
T
W
T
F
S
27
89°
64°
28
89°
60°
29
81°
66°
30
84°
63°
1
77°
57°
2
63°
58°
3
74°
58°
4
77°
59°
5
79°
59°
6
82°
59°
7
84°
58°
8
85°
55°
9
86°
57°
10
86°
62°
11
88°
63°
12
89°
64°
13
87°
60°
14
86°
53°
15
83°
52°
16
66°
42°
17
60°
43°
18
66°
47°
19
72°
48°
20
73°
50°
21
71°
44°
22
73°
49°
23
66°
38°
24
67°
40°
25
67°
43°
26
69°
45°
27
68°
46°
28
68°
45°
29
66°
46°
30
67°
46°
31
64°
45°
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 60° to 89°, with overnight lows between 38° and 64°. The average high for October is 74° with an average low of 49°. 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.
