S
M
T
W
T
F
S
30
95°
62°
31
95°
62°
1
94°
62°
2
95°
62°
3
92°
62°
4
91°
61°
5
91°
60°
6
92°
59°
7
92°
60°
8
94°
62°
9
95°
62°
10
95°
61°
11
94°
62°
12
94°
61°
13
92°
60°
14
88°
60°
15
90°
57°
16
90°
60°
17
93°
59°
18
94°
58°
19
93°
56°
20
92°
56°
21
93°
55°
22
91°
54°
23
89°
54°
24
90°
57°
25
91°
58°
26
92°
59°
27
93°
59°
28
94°
58°
29
92°
54°
30
89°
51°
1
87°
50°
2
84°
50°
3
82°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Valley Center
Valley Center's September 2026 forecast shows daily high temperatures ranging from 82° to 95°, with overnight lows between 48° and 62°. The average high for September is 92° with an average low of 58°. 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 Valley Center. See also: October | November | December.
