S
M
T
W
T
F
S
30
74°
49°
31
76°
49°
1
76°
48°
2
77°
50°
3
76°
49°
4
72°
47°
5
72°
48°
6
69°
47°
7
72°
48°
8
73°
45°
9
67°
40°
10
67°
42°
11
68°
39°
12
67°
37°
13
65°
35°
14
63°
35°
15
64°
37°
16
65°
37°
17
65°
43°
18
67°
46°
19
68°
45°
20
67°
44°
21
64°
37°
22
64°
38°
23
66°
39°
24
65°
43°
25
71°
46°
26
69°
44°
27
72°
45°
28
73°
44°
29
72°
43°
30
72°
42°
1
70°
41°
2
69°
35°
3
67°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Sierra-at-Tahoe
Sierra-at-Tahoe's September 2026 forecast shows daily high temperatures ranging from 63° to 77°, with overnight lows between 33° and 50°. The average high for September is 69° with an average low of 43°. 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 Sierra-at-Tahoe. See also: October | November | December.
