S
M
T
W
T
F
S
30
92°
53°
31
90°
52°
1
91°
52°
2
89°
51°
3
88°
50°
4
87°
51°
5
87°
49°
6
86°
51°
7
86°
52°
8
88°
51°
9
87°
50°
10
87°
50°
11
86°
51°
12
86°
56°
13
88°
57°
14
92°
56°
15
93°
55°
16
92°
54°
17
90°
56°
18
91°
57°
19
92°
57°
20
93°
56°
21
90°
53°
22
89°
52°
23
88°
51°
24
87°
52°
25
89°
55°
26
87°
49°
27
Hist. Avg.
78°
52°
28
Hist. Avg.
78°
52°
29
Hist. Avg.
77°
52°
30
Hist. Avg.
77°
51°
1
Hist. Avg.
77°
51°
2
Hist. Avg.
76°
51°
3
Hist. Avg.
76°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Penn Valley
Penn Valley's September 2026 forecast shows daily high temperatures ranging from 86° to 93°, with overnight lows between 49° and 57°. The average high for September is 89° with an average low of 53°. 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 Penn Valley. See also: October | November | December.
