S
M
T
W
T
F
S
30
58°
40°
31
67°
40°
1
77°
41°
2
75°
51°
3
61°
38°
4
57°
36°
5
58°
38°
6
64°
43°
7
61°
43°
8
63°
45°
9
70°
47°
10
69°
47°
11
64°
43°
12
59°
42°
13
62°
40°
14
60°
41°
15
63°
44°
16
62°
38°
17
54°
39°
18
55°
35°
19
54°
33°
20
54°
32°
21
52°
32°
22
52°
34°
23
53°
31°
24
51°
30°
25
50°
30°
26
50°
35°
27
54°
32°
28
60°
34°
29
61°
35°
30
61°
36°
1
58°
33°
2
61°
38°
3
60°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Banff
Banff's September 2026 forecast shows daily high temperatures ranging from 50° to 70°, with overnight lows between 30° and 47°. The average high for September is 58° with an average low of 38°. 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 Banff. See also: October | November | December.
