S
M
T
W
T
F
S
30
90°
74°
31
90°
75°
1
89°
77°
2
89°
74°
3
90°
76°
4
91°
77°
5
90°
76°
6
88°
78°
7
87°
76°
8
88°
77°
9
89°
76°
10
90°
77°
11
88°
78°
12
89°
76°
13
89°
77°
14
88°
77°
15
89°
76°
16
85°
76°
17
85°
75°
18
87°
76°
19
86°
75°
20
86°
76°
21
87°
76°
22
86°
75°
23
86°
76°
24
87°
76°
25
86°
75°
26
87°
75°
27
87°
74°
28
86°
75°
29
85°
75°
30
85°
73°
1
84°
74°
2
84°
74°
3
85°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Oldsmar
Oldsmar's September 2026 forecast shows daily high temperatures ranging from 84° to 91°, with overnight lows between 73° and 78°. The average high for September is 87° with an average low of 76°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Oldsmar. See also: October | November | December.
