S
M
T
W
T
F
S
26
90°
81°
27
84°
77°
28
88°
79°
29
86°
81°
30
86°
73°
31
86°
81°
1
87°
77°
2
85°
78°
3
84°
78°
4
88°
75°
5
90°
77°
6
91°
75°
7
90°
76°
8
89°
77°
9
90°
76°
10
89°
78°
11
90°
78°
12
91°
80°
13
91°
78°
14
92°
76°
15
86°
77°
16
85°
76°
17
88°
77°
18
88°
76°
19
89°
78°
20
89°
78°
21
90°
77°
22
87°
77°
23
88°
76°
24
89°
77°
25
88°
78°
26
89°
78°
27
89°
77°
28
87°
78°
29
88°
77°
30
90°
78°
31
90°
78°
1
89°
77°
2
89°
78°
3
91°
77°
4
87°
76°
5
87°
76°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Oldsmar
Oldsmar's August 2026 forecast shows daily high temperatures ranging from 84° to 92°, with overnight lows between 75° and 80°. The average high for August is 89° with an average low of 77°. 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 Oldsmar. See also: September | October | November.