S
M
T
W
T
F
S
30
86°
59°
31
86°
56°
1
87°
57°
2
88°
56°
3
86°
54°
4
84°
55°
5
83°
55°
6
83°
56°
7
85°
55°
8
87°
56°
9
84°
54°
10
84°
54°
11
83°
55°
12
83°
55°
13
86°
58°
14
88°
59°
15
89°
60°
16
89°
61°
17
88°
59°
18
89°
59°
19
88°
58°
20
89°
57°
21
87°
56°
22
86°
53°
23
81°
55°
24
83°
54°
25
87°
56°
26
Hist. Avg.
88°
58°
27
Hist. Avg.
87°
58°
28
Hist. Avg.
87°
57°
29
Hist. Avg.
87°
57°
30
Hist. Avg.
86°
56°
1
Hist. Avg.
86°
56°
2
Hist. Avg.
86°
56°
3
Hist. Avg.
85°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Cajon
Cajon's September 2026 forecast shows daily high temperatures ranging from 81° to 89°, with overnight lows between 53° and 61°. The average high for September is 86° with an average low of 56°. 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 Cajon. See also: October | November | December.
