S
M
T
W
T
F
S
30
91°
56°
31
95°
57°
1
94°
59°
2
91°
55°
3
89°
54°
4
89°
55°
5
90°
56°
6
90°
54°
7
89°
54°
8
89°
55°
9
88°
57°
10
88°
60°
11
89°
57°
12
89°
59°
13
90°
62°
14
94°
61°
15
95°
60°
16
95°
58°
17
94°
57°
18
94°
56°
19
93°
56°
20
91°
57°
21
93°
58°
22
93°
58°
23
92°
57°
24
86°
58°
25
82°
56°
26
81°
55°
27
82°
56°
28
83°
57°
29
84°
58°
30
82°
57°
1
83°
53°
2
82°
53°
3
87°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Plumas Lake
Plumas Lake's September 2026 forecast shows daily high temperatures ranging from 81° to 95°, with overnight lows between 53° and 62°. The average high for September is 89° with an average low of 57°. 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 Plumas Lake. See also: October | November | December.