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
73°
32°
21
75°
41°
22
73°
32°
23
71°
42°
24
71°
46°
25
63°
38°
26
64°
39°
27
59°
31°
28
66°
36°
29
67°
39°
30
66°
36°
1
62°
35°
2
61°
35°
3
64°
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 59° to 71°, with overnight lows between 31° and 46°. The average high for September is 65° 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.
