S
M
T
W
T
F
S
30
77°
53°
31
76°
53°
1
76°
54°
2
77°
52°
3
76°
52°
4
77°
53°
5
77°
58°
6
76°
56°
7
77°
56°
8
76°
54°
9
75°
51°
10
80°
50°
11
75°
49°
12
75°
50°
13
76°
49°
14
74°
55°
15
81°
56°
16
81°
57°
17
80°
56°
18
80°
47°
19
78°
46°
20
72°
47°
21
71°
53°
22
73°
52°
23
78°
53°
24
77°
54°
25
78°
44°
26
77°
42°
27
69°
43°
28
67°
44°
29
68°
44°
30
67°
49°
1
67°
42°
2
66°
39°
3
Hist. Avg.
74°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Stelle
Stelle's September 2026 forecast shows daily high temperatures ranging from 66° to 81°, with overnight lows between 39° and 58°. The average high for September is 75° with an average low of 50°. 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 Stelle. See also: October | November | December.