S
M
T
W
T
F
S
30
82°
64°
31
82°
63°
1
81°
55°
2
80°
52°
3
82°
62°
4
79°
63°
5
84°
65°
6
80°
63°
7
75°
63°
8
73°
51°
9
71°
50°
10
74°
52°
11
73°
50°
12
74°
53°
13
73°
50°
14
74°
52°
15
74°
48°
16
69°
44°
17
72°
51°
18
75°
52°
19
74°
49°
20
64°
45°
21
70°
49°
22
66°
47°
23
68°
48°
24
70°
47°
25
64°
44°
26
58°
39°
27
57°
36°
28
56°
43°
29
67°
38°
30
55°
40°
1
57°
42°
2
54°
38°
3
62°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Stephen
Stephen's September 2026 forecast shows daily high temperatures ranging from 54° to 84°, with overnight lows between 36° and 65°. The average high for September is 69° with an average low of 49°. 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 Stephen. See also: October | November | December.