S
M
T
W
T
F
S
26
92°
82°
27
86°
77°
28
88°
83°
29
86°
80°
30
86°
78°
31
87°
83°
1
87°
77°
2
84°
80°
3
87°
79°
4
87°
79°
5
88°
78°
6
91°
80°
7
90°
79°
8
89°
78°
9
90°
79°
10
88°
80°
11
90°
80°
12
91°
82°
13
91°
81°
14
92°
82°
15
90°
78°
16
86°
77°
17
88°
78°
18
89°
77°
19
88°
79°
20
89°
79°
21
89°
78°
22
90°
78°
23
88°
77°
24
89°
78°
25
89°
79°
26
90°
79°
27
90°
78°
28
88°
79°
29
89°
78°
30
91°
79°
31
91°
79°
1
90°
78°
2
90°
79°
3
91°
79°
4
88°
78°
5
87°
78°
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 84° to 92°, with overnight lows between 77° and 82°. The average high for August is 89° with an average low of 79°. 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.
