S
M
T
W
T
F
S
30
95°
59°
31
95°
60°
1
94°
58°
2
93°
58°
3
93°
59°
4
94°
58°
5
93°
59°
6
93°
60°
7
94°
60°
8
92°
59°
9
91°
61°
10
92°
62°
11
94°
60°
12
96°
60°
13
96°
62°
14
95°
64°
15
96°
63°
16
95°
62°
17
96°
61°
18
96°
60°
19
95°
62°
20
95°
63°
21
94°
64°
22
96°
63°
23
96°
63°
24
95°
60°
25
88°
57°
26
85°
56°
27
87°
58°
28
86°
60°
29
90°
58°
30
86°
55°
1
83°
56°
2
84°
58°
3
91°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Perris Valley
Perris Valley's September 2026 forecast shows daily high temperatures ranging from 83° to 96°, with overnight lows between 55° and 64°. The average high for September is 92° with an average low of 60°. 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 Valley. See also: October | November | December.
