S
M
T
W
T
F
S
30
66°
46°
31
66°
54°
1
75°
50°
2
73°
54°
3
64°
54°
4
59°
50°
5
55°
48°
6
59°
52°
7
66°
50°
8
68°
50°
9
70°
55°
10
57°
52°
11
54°
43°
12
55°
39°
13
66°
34°
14
55°
41°
15
54°
36°
16
64°
36°
17
64°
37°
18
68°
41°
19
72°
43°
20
75°
45°
21
77°
46°
22
61°
39°
23
61°
37°
24
59°
39°
25
52°
46°
26
48°
39°
27
57°
41°
28
N/A
29
54°
45°
30
55°
37°
1
55°
32°
2
54°
27°
3
52°
32°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Slave Lake
Slave Lake's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Slave Lake. See also: October | November | December.
