S
M
T
W
T
F
S
31
81°
50°
1
84°
48°
2
86°
52°
3
77°
52°
4
72°
43°
5
63°
34°
6
75°
36°
7
84°
45°
8
86°
50°
9
86°
50°
10
88°
63°
11
90°
64°
12
86°
54°
13
81°
52°
14
72°
54°
15
82°
45°
16
66°
46°
17
64°
46°
18
72°
43°
19
72°
43°
20
77°
45°
21
82°
46°
22
64°
52°
23
72°
48°
24
75°
43°
25
82°
45°
26
82°
48°
27
81°
41°
28
82°
55°
29
81°
54°
30
82°
50°
1
77°
52°
2
82°
45°
3
88°
50°
4
72°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Osage
Osage's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Osage. See also: October | November | December.