S
M
T
W
T
F
S
30
58°
38°
31
65°
42°
1
75°
34°
2
72°
42°
3
58°
43°
4
51°
39°
5
51°
40°
6
60°
37°
7
64°
39°
8
63°
39°
9
60°
44°
10
52°
31°
11
50°
34°
12
54°
30°
13
52°
37°
14
52°
33°
15
56°
33°
16
56°
36°
17
62°
37°
18
63°
40°
19
67°
42°
20
57°
35°
21
55°
37°
22
55°
37°
23
63°
41°
24
54°
35°
25
46°
32°
26
47°
33°
27
47°
30°
28
45°
27°
29
44°
25°
30
43°
25°
1
43°
28°
2
44°
27°
3
41°
23°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lake Louise
Lake Louise's September 2026 forecast shows daily high temperatures ranging from 41° to 67°, with overnight lows between 23° and 42°. The average high for September is 52° with an average low of 33°. 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 Lake Louise. See also: October | November | December.
