S
M
T
W
T
F
S
30
79°
30°
31
79°
37°
1
70°
46°
2
63°
41°
3
60°
39°
4
60°
35°
5
71°
36°
6
67°
32°
7
69°
32°
8
74°
36°
9
71°
42°
10
73°
40°
11
73°
40°
12
71°
38°
13
72°
37°
14
73°
38°
15
88°
33°
16
80°
37°
17
80°
37°
18
71°
36°
19
71°
33°
20
72°
34°
21
78°
37°
22
78°
37°
23
75°
36°
24
73°
35°
25
69°
34°
26
73°
35°
27
76°
36°
28
76°
36°
29
75°
35°
30
74°
35°
1
75°
36°
2
74°
35°
3
73°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Truckee
Truckee's September 2026 forecast shows daily high temperatures ranging from 60° to 88°, with overnight lows between 32° and 42°. The average high for September is 73° with an average low of 36°. 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 Truckee. See also: October | November | December.
