S
M
T
W
T
F
S
30
87°
55°
31
86°
55°
1
87°
54°
2
89°
55°
3
90°
55°
4
85°
54°
5
85°
51°
6
86°
50°
7
85°
49°
8
86°
51°
9
85°
48°
10
87°
49°
11
89°
49°
12
85°
51°
13
Hist. Avg.
91°
48°
14
Hist. Avg.
91°
48°
15
Hist. Avg.
91°
48°
16
Hist. Avg.
91°
48°
17
Hist. Avg.
90°
48°
18
Hist. Avg.
90°
48°
19
Hist. Avg.
90°
47°
20
Hist. Avg.
90°
47°
21
Hist. Avg.
89°
47°
22
Hist. Avg.
89°
47°
23
Hist. Avg.
89°
47°
24
Hist. Avg.
89°
47°
25
Hist. Avg.
88°
47°
26
Hist. Avg.
88°
46°
27
Hist. Avg.
88°
46°
28
Hist. Avg.
87°
46°
29
Hist. Avg.
87°
46°
30
Hist. Avg.
87°
46°
1
Hist. Avg.
86°
46°
2
Hist. Avg.
86°
46°
3
Hist. Avg.
86°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Lower Lake
Lower Lake's September 2026 forecast shows daily high temperatures ranging from 85° to 90°, with overnight lows between 48° and 55°. The average high for September is 87° with an average low of 52°. 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 Lower Lake. See also: October | November | December.
