S
M
T
W
T
F
S
30
73°
51°
31
77°
47°
1
71°
50°
2
68°
52°
3
68°
48°
4
68°
47°
5
72°
49°
6
73°
51°
7
73°
50°
8
72°
49°
9
73°
48°
10
73°
51°
11
70°
50°
12
72°
50°
13
71°
49°
14
72°
49°
15
73°
46°
16
66°
47°
17
66°
48°
18
66°
43°
19
66°
43°
20
67°
49°
21
66°
48°
22
65°
46°
23
65°
41°
24
64°
40°
25
64°
39°
26
66°
42°
27
72°
46°
28
73°
46°
29
72°
47°
30
70°
46°
1
71°
47°
2
72°
47°
3
71°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Oso
Oso's September 2026 forecast shows daily high temperatures ranging from 64° to 73°, with overnight lows between 39° and 52°. The average high for September is 69° with an average low of 47°. 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 Oso. See also: October | November | December.
