S
M
T
W
T
F
S
26
84°
74°
27
94°
76°
28
92°
73°
29
87°
75°
30
84°
76°
1
85°
77°
2
84°
73°
3
82°
69°
4
87°
71°
5
90°
73°
6
87°
74°
7
86°
75°
8
90°
78°
9
90°
78°
10
90°
79°
11
92°
80°
12
89°
76°
13
86°
77°
14
88°
77°
15
94°
76°
16
90°
80°
17
93°
78°
18
93°
75°
19
92°
78°
20
91°
78°
21
90°
79°
22
92°
78°
23
90°
79°
24
89°
77°
25
90°
78°
26
92°
79°
27
91°
77°
28
88°
78°
29
87°
77°
30
89°
78°
31
88°
78°
1
87°
79°
2
87°
78°
3
88°
78°
4
88°
77°
5
89°
77°
6
89°
78°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in St. Petersburg
St. Petersburg's May 2026 forecast shows daily high temperatures ranging from 87° to 92°, with overnight lows between 77° and 79°. The average high for May is 89° with an average low of 78°. 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 St. Petersburg. See also: June | July | August.
