S
M
T
W
T
F
S
30
58°
40°
31
67°
40°
1
77°
41°
2
75°
51°
3
63°
49°
4
53°
43°
5
49°
44°
6
54°
42°
7
59°
41°
8
68°
34°
9
67°
43°
10
59°
35°
11
51°
35°
12
52°
35°
13
52°
38°
14
53°
37°
15
59°
38°
16
63°
40°
17
69°
42°
18
70°
45°
19
70°
44°
20
61°
40°
21
60°
41°
22
64°
43°
23
60°
36°
24
59°
39°
25
52°
36°
26
51°
38°
27
52°
34°
28
50°
31°
29
50°
29°
30
48°
29°
1
49°
32°
2
49°
31°
3
47°
28°
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 47° to 70°, with overnight lows between 28° and 45°. The average high for September is 56° 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 Banff. See also: October | November | December.
