S
M
T
W
T
F
S
30
79°
56°
31
79°
56°
1
81°
61°
2
83°
60°
3
81°
59°
4
78°
60°
5
77°
59°
6
77°
59°
7
79°
57°
8
81°
58°
9
82°
56°
10
Hist. Avg.
79°
58°
11
Hist. Avg.
78°
58°
12
Hist. Avg.
78°
57°
13
Hist. Avg.
78°
57°
14
Hist. Avg.
78°
57°
15
Hist. Avg.
77°
56°
16
Hist. Avg.
77°
56°
17
Hist. Avg.
77°
55°
18
Hist. Avg.
76°
55°
19
Hist. Avg.
76°
55°
20
Hist. Avg.
76°
54°
21
Hist. Avg.
75°
54°
22
Hist. Avg.
75°
54°
23
Hist. Avg.
75°
53°
24
Hist. Avg.
74°
53°
25
Hist. Avg.
74°
52°
26
Hist. Avg.
74°
52°
27
Hist. Avg.
73°
52°
28
Hist. Avg.
73°
51°
29
Hist. Avg.
73°
51°
30
Hist. Avg.
72°
50°
1
Hist. Avg.
72°
50°
2
Hist. Avg.
72°
50°
3
Hist. Avg.
72°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in California
California's September 2026 forecast shows daily high temperatures ranging from 77° to 83°, with overnight lows between 56° and 61°. The average high for September is 80° 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 California. See also: October | November | December.
