S
M
T
W
T
F
S
30
79°
30°
31
79°
37°
1
70°
46°
2
63°
45°
3
59°
50°
4
59°
45°
5
64°
41°
6
66°
37°
7
73°
30°
8
81°
32°
9
88°
37°
10
84°
45°
11
81°
41°
12
75°
36°
13
70°
32°
14
73°
27°
15
73°
28°
16
72°
32°
17
64°
32°
18
70°
25°
19
75°
30°
20
67°
41°
21
69°
38°
22
69°
39°
23
71°
36°
24
70°
41°
25
69°
38°
26
67°
37°
27
65°
39°
28
63°
38°
29
61°
39°
30
62°
36°
1
61°
36°
2
65°
32°
3
67°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Donner Summit Ski Area
Donner Summit Ski Area's September 2026 forecast shows daily high temperatures ranging from 61° to 71°, with overnight lows between 32° and 41°. The average high for September is 66° with an average low of 38°. 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 Donner Summit Ski Area. See also: October | November | December.
