S
M
T
W
T
F
S
30
96°
70°
31
96°
70°
1
95°
69°
2
96°
68°
3
95°
68°
4
95°
67°
5
94°
67°
6
95°
68°
7
94°
67°
8
93°
66°
9
92°
65°
10
93°
66°
11
93°
67°
12
95°
68°
13
Hist. Avg.
91°
64°
14
Hist. Avg.
91°
63°
15
Hist. Avg.
90°
63°
16
Hist. Avg.
90°
62°
17
Hist. Avg.
90°
62°
18
Hist. Avg.
90°
62°
19
Hist. Avg.
89°
62°
20
Hist. Avg.
89°
61°
21
Hist. Avg.
89°
61°
22
Hist. Avg.
88°
60°
23
Hist. Avg.
88°
60°
24
Hist. Avg.
88°
60°
25
Hist. Avg.
88°
59°
26
Hist. Avg.
87°
59°
27
Hist. Avg.
87°
59°
28
Hist. Avg.
87°
58°
29
Hist. Avg.
86°
58°
30
Hist. Avg.
86°
58°
1
Hist. Avg.
86°
57°
2
Hist. Avg.
86°
57°
3
Hist. Avg.
85°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Stephenville
Stephenville's September 2026 forecast shows daily high temperatures ranging from 92° to 96°, with overnight lows between 65° and 70°. The average high for September is 94° with an average low of 68°. 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.
