S
M
T
W
T
F
S
30
96°
64°
31
96°
66°
1
95°
67°
2
96°
67°
3
96°
66°
4
95°
67°
5
96°
67°
6
88°
66°
7
87°
65°
8
90°
64°
9
89°
61°
10
89°
60°
11
87°
60°
12
87°
59°
13
88°
58°
14
86°
59°
15
86°
58°
16
87°
60°
17
88°
59°
18
87°
58°
19
85°
59°
20
86°
62°
21
88°
63°
22
90°
63°
23
86°
63°
24
92°
64°
25
Hist. Avg.
88°
61°
26
Hist. Avg.
87°
60°
27
Hist. Avg.
87°
60°
28
Hist. Avg.
86°
60°
29
Hist. Avg.
86°
60°
30
Hist. Avg.
86°
59°
1
Hist. Avg.
85°
59°
2
Hist. Avg.
85°
59°
3
Hist. Avg.
84°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Stevenson Ranch
Stevenson Ranch's September 2026 forecast shows daily high temperatures ranging from 85° to 96°, with overnight lows between 58° and 67°. The average high for September is 90° with an average low of 63°. 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 Stevenson Ranch. See also: October | November | December.
