S
M
T
W
T
F
S
30
64°
51°
31
62°
52°
1
63°
53°
2
65°
52°
3
65°
48°
4
64°
49°
5
65°
52°
6
64°
52°
7
64°
53°
8
63°
52°
9
64°
52°
10
64°
51°
11
63°
52°
12
63°
51°
13
62°
50°
14
61°
49°
15
61°
50°
16
59°
51°
17
60°
49°
18
63°
50°
19
60°
48°
20
61°
50°
21
63°
50°
22
62°
49°
23
59°
49°
24
58°
48°
25
61°
46°
26
61°
45°
27
58°
44°
28
57°
48°
29
61°
44°
30
58°
46°
1
57°
47°
2
60°
47°
3
57°
48°
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 57° to 65°, with overnight lows between 44° and 53°. The average high for September is 61° with an average low of 49°. 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.
