S
M
T
W
T
F
S
30
52°
35°
31
54°
35°
1
55°
39°
2
58°
37°
3
60°
36°
4
67°
42°
5
71°
45°
6
68°
49°
7
65°
46°
8
65°
49°
9
60°
44°
10
57°
42°
11
56°
42°
12
59°
44°
13
62°
46°
14
64°
45°
15
49°
31°
16
50°
38°
17
49°
37°
18
48°
34°
19
47°
32°
20
47°
31°
21
46°
31°
22
45°
32°
23
45°
30°
24
44°
29°
25
44°
30°
26
43°
32°
27
46°
33°
28
46°
36°
29
47°
37°
30
48°
34°
1
47°
33°
2
43°
32°
3
42°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Whitehorse
Whitehorse's September 2026 forecast shows daily high temperatures ranging from 42° to 71°, with overnight lows between 29° and 49°. The average high for September is 53° with an average low of 37°. 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 Whitehorse. See also: October | November | December.
