S
M
T
W
T
F
S
30
91°
54°
31
90°
52°
1
90°
53°
2
91°
54°
3
93°
55°
4
94°
57°
5
94°
57°
6
93°
56°
7
94°
57°
8
94°
57°
9
93°
56°
10
87°
56°
11
86°
57°
12
91°
57°
13
92°
58°
14
93°
56°
15
92°
55°
16
89°
54°
17
90°
55°
18
90°
55°
19
92°
55°
20
85°
48°
21
83°
48°
22
Hist. Avg.
80°
53°
23
Hist. Avg.
79°
53°
24
Hist. Avg.
79°
53°
25
Hist. Avg.
79°
53°
26
Hist. Avg.
78°
52°
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 83° to 94°, with overnight lows between 48° and 58°. The average high for September is 91° with an average low of 55°. 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.
