S
M
T
W
T
F
S
30
98°
59°
31
94°
59°
1
89°
60°
2
90°
64°
3
95°
62°
4
92°
63°
5
92°
62°
6
94°
62°
7
95°
63°
8
96°
65°
9
95°
61°
10
97°
66°
11
97°
64°
12
96°
64°
13
97°
63°
14
96°
64°
15
96°
64°
16
95°
63°
17
95°
64°
18
90°
58°
19
86°
55°
20
84°
55°
21
84°
54°
22
85°
55°
23
86°
56°
24
85°
55°
25
85°
55°
26
86°
54°
27
84°
53°
28
84°
55°
29
85°
57°
30
83°
56°
1
83°
56°
2
84°
54°
3
83°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Perris
Perris's September 2026 forecast shows daily high temperatures ranging from 83° to 98°, with overnight lows between 53° and 66°. The average high for September is 90° with an average low of 59°. 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 Perris. See also: October | November | December.
