S
M
T
W
T
F
S
26
56°
45°
27
66°
43°
28
66°
48°
29
53°
45°
30
58°
42°
1
49°
39°
2
50°
33°
3
64°
33°
4
77°
49°
5
62°
46°
6
57°
45°
7
59°
40°
8
64°
39°
9
72°
48°
10
64°
41°
11
58°
35°
12
66°
36°
13
59°
47°
14
67°
45°
15
72°
39°
16
79°
51°
17
87°
63°
18
89°
68°
19
87°
67°
20
70°
50°
21
60°
42°
22
61°
46°
23
58°
55°
24
71°
52°
25
76°
53°
26
80°
50°
27
82°
54°
28
75°
50°
29
81°
44°
30
67°
50°
31
75°
50°
1
78°
48°
2
76°
47°
3
78°
53°
4
83°
62°
5
84°
62°
6
80°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Petersburg
Petersburg's May 2026 forecast shows daily high temperatures ranging from 75° to 84°, with overnight lows between 47° and 64°. The average high for May is 79° with an average low of 55°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Petersburg. See also: June | July | August.
