S
M
T
W
T
F
S
26
90°
78°
27
87°
79°
28
88°
80°
29
89°
80°
30
90°
79°
31
89°
79°
1
90°
78°
2
90°
79°
3
90°
79°
4
89°
78°
5
89°
80°
6
90°
79°
7
90°
78°
8
91°
79°
9
90°
80°
10
91°
80°
11
90°
79°
12
89°
79°
13
89°
78°
14
88°
78°
15
88°
79°
16
88°
78°
17
88°
78°
18
88°
77°
19
89°
78°
20
88°
79°
21
88°
78°
22
88°
77°
23
90°
78°
24
91°
76°
25
89°
76°
26
89°
76°
27
90°
77°
28
89°
76°
29
90°
77°
30
89°
77°
31
92°
78°
1
92°
77°
2
91°
77°
3
91°
78°
4
90°
78°
5
90°
77°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in St. Petersburg
St. Petersburg's August 2026 forecast shows daily high temperatures ranging from 87° to 92°, with overnight lows between 76° and 80°. The average high for August 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 August weather will actually feel in St. Petersburg. See also: September | October | November.
