S
M
T
W
T
F
S
30
92°
66°
31
84°
55°
1
77°
61°
2
89°
53°
3
99°
71°
4
95°
68°
5
96°
69°
6
91°
68°
7
90°
65°
8
86°
55°
9
83°
54°
10
79°
55°
11
84°
58°
12
82°
52°
13
80°
52°
14
84°
53°
15
83°
53°
16
76°
47°
17
83°
56°
18
81°
54°
19
78°
52°
20
68°
51°
21
73°
52°
22
74°
52°
23
80°
54°
24
80°
51°
25
72°
47°
26
65°
44°
27
71°
42°
28
64°
48°
29
76°
47°
30
65°
48°
1
75°
46°
2
61°
42°
3
62°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Stephan
Stephan's September 2026 forecast shows daily high temperatures ranging from 61° to 96°, with overnight lows between 42° and 69°. The average high for September is 78° with an average low of 53°. 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 Stephan. See also: October | November | December.
