S
M
T
W
T
F
S
26
80°
53°
27
83°
62°
28
66°
54°
29
67°
48°
30
66°
41°
1
64°
43°
2
62°
44°
3
75°
42°
4
78°
57°
5
69°
47°
6
63°
42°
7
67°
48°
8
71°
51°
9
79°
58°
10
66°
45°
11
70°
51°
12
78°
60°
13
75°
57°
14
78°
59°
15
78°
56°
16
74°
57°
17
75°
56°
18
76°
56°
19
80°
57°
20
71°
53°
21
72°
54°
22
72°
53°
23
74°
54°
24
75°
57°
25
75°
57°
26
76°
56°
27
76°
57°
28
77°
55°
29
77°
56°
30
81°
61°
31
82°
60°
1
82°
64°
2
83°
63°
3
85°
65°
4
86°
66°
5
86°
66°
6
85°
65°
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 63° to 86°, with overnight lows between 42° and 66°. The average high for May is 76° with an average low of 57°. 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.
