S
M
T
W
T
F
S
30
90°
66°
31
90°
66°
1
91°
67°
2
92°
66°
3
89°
66°
4
86°
65°
5
86°
64°
6
87°
64°
7
89°
66°
8
92°
66°
9
92°
67°
10
91°
66°
11
90°
66°
12
88°
65°
13
89°
66°
14
84°
64°
15
85°
61°
16
85°
63°
17
89°
64°
18
92°
62°
19
91°
61°
20
90°
61°
21
91°
62°
22
88°
60°
23
87°
60°
24
89°
62°
25
89°
66°
26
91°
66°
27
91°
65°
28
93°
65°
29
91°
63°
30
88°
59°
1
86°
58°
2
82°
57°
3
81°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Temecula
Temecula's September 2026 forecast shows daily high temperatures ranging from 81° to 93°, with overnight lows between 54° and 67°. The average high for September is 89° 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 Temecula. See also: October | November | December.
