S
M
T
W
T
F
S
30
89°
70°
31
85°
65°
1
85°
63°
2
82°
63°
3
80°
64°
4
82°
63°
5
89°
63°
6
76°
66°
7
93°
73°
8
94°
76°
9
103°
75°
10
96°
71°
11
90°
69°
12
87°
68°
13
86°
67°
14
87°
66°
15
86°
67°
16
87°
66°
17
89°
68°
18
87°
67°
19
88°
66°
20
87°
67°
21
85°
63°
22
81°
63°
23
82°
64°
24
80°
63°
25
82°
63°
26
82°
62°
27
80°
62°
28
83°
65°
29
85°
65°
30
86°
64°
1
86°
64°
2
87°
65°
3
87°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Pico Rivera
Pico Rivera's September 2026 forecast shows daily high temperatures ranging from 80° to 103°, with overnight lows between 62° and 76°. The average high for September is 87° with an average low of 66°. 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 Pico Rivera. See also: October | November | December.
