S
M
T
W
T
F
S
26
34°
19°
27
49°
18°
28
56°
22°
29
60°
22°
30
63°
26°
1
65°
30°
2
66°
31°
3
70°
33°
4
56°
40°
5
56°
34°
6
71°
26°
7
68°
32°
8
67°
32°
9
65°
42°
10
68°
37°
11
60°
34°
12
68°
29°
13
65°
38°
14
56°
40°
15
53°
38°
16
38°
32°
17
46°
29°
18
56°
26°
19
56°
35°
20
50°
33°
21
62°
34°
22
64°
31°
23
67°
34°
24
67°
46°
25
72°
39°
26
75°
46°
27
75°
47°
28
77°
41°
29
72°
51°
30
59°
46°
31
N/A
1
48°
41°
2
56°
41°
3
67°
43°
4
67°
47°
5
64°
40°
6
61°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Banff
Banff's May 2026 forecast shows daily high temperatures ranging from 48° to 67°, with overnight lows between 40° and 47°. The average high for May is 61° with an average low of 42°. 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.
