S
M
T
W
T
F
S
30
67°
45°
31
66°
44°
1
66°
44°
2
64°
43°
3
59°
40°
4
57°
40°
5
58°
37°
6
57°
42°
7
56°
41°
8
57°
42°
9
56°
39°
10
55°
37°
11
54°
31°
12
52°
32°
13
51°
31°
14
53°
32°
15
53°
35°
16
Hist. Avg.
56°
36°
17
Hist. Avg.
56°
36°
18
Hist. Avg.
56°
36°
19
Hist. Avg.
55°
36°
20
Hist. Avg.
55°
35°
21
Hist. Avg.
54°
35°
22
Hist. Avg.
54°
35°
23
Hist. Avg.
54°
35°
24
Hist. Avg.
53°
34°
25
Hist. Avg.
53°
34°
26
Hist. Avg.
52°
34°
27
Hist. Avg.
52°
34°
28
Hist. Avg.
52°
33°
29
Hist. Avg.
51°
33°
30
Hist. Avg.
51°
33°
1
Hist. Avg.
50°
32°
2
Hist. Avg.
50°
32°
3
Hist. Avg.
49°
32°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Watson Lake
Watson Lake's September 2026 forecast shows daily high temperatures ranging from 51° to 67°, with overnight lows between 31° and 45°. The average high for September is 58° with an average low of 39°. 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 Watson Lake. See also: October | November | December.
