S
M
T
W
T
F
S
26
51°
41°
27
50°
40°
28
51°
42°
29
53°
44°
30
52°
44°
1
52°
43°
2
54°
42°
3
52°
43°
4
52°
44°
5
53°
42°
6
52°
44°
7
53°
44°
8
53°
45°
9
54°
45°
10
53°
44°
11
53°
45°
12
54°
45°
13
54°
44°
14
53°
43°
15
53°
42°
16
54°
44°
17
55°
45°
18
60°
47°
19
60°
47°
20
59°
46°
21
59°
43°
22
60°
44°
23
60°
47°
24
59°
47°
25
59°
48°
26
61°
48°
27
59°
47°
28
61°
47°
29
61°
45°
30
59°
44°
31
58°
41°
1
57°
45°
2
60°
48°
3
61°
46°
4
60°
48°
5
62°
47°
6
62°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Banff
Banff's May 2026 forecast shows daily high temperatures ranging from 50° to 62°, with overnight lows between 40° and 49°. The average high for May is 56° with an average low of 45°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Banff. See also: June | July | August.
