S
M
T
W
T
F
S
30
91°
65°
31
92°
63°
1
93°
62°
2
92°
60°
3
90°
59°
4
88°
60°
5
88°
60°
6
89°
62°
7
89°
63°
8
91°
60°
9
89°
59°
10
88°
60°
11
88°
62°
12
89°
63°
13
91°
65°
14
93°
63°
15
94°
64°
16
93°
66°
17
94°
65°
18
94°
65°
19
91°
64°
20
92°
65°
21
91°
62°
22
90°
61°
23
86°
62°
24
88°
61°
25
91°
63°
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 86° to 94°, with overnight lows between 59° and 66°. The average high for September is 91° with an average low of 62°. 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.
