S
M
T
W
T
F
S
26
56°
40°
27
56°
40°
28
46°
33°
29
61°
31°
30
55°
36°
1
57°
32°
2
70°
27°
3
73°
45°
4
72°
40°
5
55°
38°
6
60°
32°
7
69°
41°
8
76°
44°
9
73°
38°
10
73°
33°
11
85°
43°
12
77°
44°
13
81°
37°
14
85°
56°
15
93°
50°
16
87°
47°
17
83°
53°
18
49°
41°
19
62°
38°
20
60°
43°
21
61°
46°
22
64°
48°
23
76°
53°
24
83°
55°
25
80°
60°
26
83°
58°
27
77°
56°
28
80°
57°
29
76°
56°
30
79°
57°
31
77°
54°
1
79°
58°
2
76°
57°
3
72°
55°
4
75°
59°
5
80°
60°
6
80°
60°
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 49° to 83°, with overnight lows between 38° and 60°. The average high for May is 73° with an average low of 54°. 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.
