S
M
T
W
T
F
S
30
90°
64°
31
85°
58°
1
82°
54°
2
87°
53°
3
86°
54°
4
84°
56°
5
87°
65°
6
81°
62°
7
90°
62°
8
91°
63°
9
90°
61°
10
89°
60°
11
88°
59°
12
87°
60°
13
87°
61°
14
91°
62°
15
90°
59°
16
92°
63°
17
91°
63°
18
84°
60°
19
85°
61°
20
88°
62°
21
90°
62°
22
88°
61°
23
87°
62°
24
87°
61°
25
86°
62°
26
90°
62°
27
89°
63°
28
89°
62°
29
88°
61°
30
89°
62°
1
88°
61°
2
87°
61°
3
85°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Piru
Piru's September 2026 forecast shows daily high temperatures ranging from 81° to 92°, with overnight lows between 53° and 65°. The average high for September is 88° with an average low of 61°. 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 Piru. See also: October | November | December.