S
M
T
W
T
F
S
30
92°
70°
31
87°
64°
1
84°
62°
2
83°
57°
3
82°
55°
4
84°
55°
5
87°
66°
6
80°
63°
7
89°
62°
8
95°
63°
9
93°
64°
10
92°
63°
11
91°
60°
12
90°
60°
13
85°
58°
14
88°
59°
15
91°
59°
16
90°
56°
17
92°
59°
18
84°
52°
19
85°
54°
20
87°
57°
21
89°
58°
22
87°
58°
23
86°
59°
24
84°
54°
25
85°
58°
26
89°
58°
27
88°
57°
28
86°
58°
29
88°
58°
30
87°
56°
1
88°
57°
2
87°
57°
3
86°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Calimesa
Calimesa's September 2026 forecast shows daily high temperatures ranging from 80° to 95°, with overnight lows between 52° and 66°. The average high for September is 88° 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 Calimesa. See also: October | November | December.
