S
M
T
W
T
F
S
30
68°
53°
31
65°
51°
1
64°
46°
2
68°
45°
3
64°
41°
4
68°
55°
5
61°
52°
6
58°
51°
7
61°
50°
8
62°
45°
9
61°
50°
10
64°
56°
11
64°
55°
12
63°
49°
13
63°
51°
14
64°
53°
15
66°
55°
16
65°
52°
17
63°
39°
18
60°
51°
19
61°
50°
20
58°
49°
21
59°
51°
22
61°
50°
23
62°
50°
24
62°
49°
25
55°
49°
26
58°
50°
27
61°
50°
28
60°
49°
29
59°
48°
30
58°
46°
1
59°
47°
2
56°
47°
3
52°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Stephenville
Stephenville's September 2026 forecast shows daily high temperatures ranging from 52° to 68°, with overnight lows between 39° and 56°. The average high for September is 61° 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 Stephenville. See also: October | November | December.
