S
M
T
W
T
F
S
26
29°
18°
27
46°
21°
28
57°
26°
29
60°
27°
30
69°
38°
1
70°
44°
2
67°
45°
3
71°
45°
4
57°
39°
5
51°
36°
6
72°
31°
7
70°
51°
8
70°
42°
9
65°
47°
10
72°
45°
11
62°
45°
12
74°
38°
13
75°
49°
14
67°
49°
15
58°
42°
16
49°
33°
17
52°
33°
18
55°
31°
19
63°
41°
20
55°
39°
21
66°
45°
22
69°
45°
23
75°
47°
24
73°
50°
25
74°
49°
26
62°
47°
27
64°
46°
28
67°
45°
29
64°
44°
30
64°
44°
31
69°
45°
1
66°
46°
2
72°
42°
3
59°
43°
4
61°
45°
5
60°
46°
6
60°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Calgary
Calgary's May 2026 forecast shows daily high temperatures ranging from 55° to 75°, with overnight lows between 39° and 50°. The average high for May is 66° 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 Calgary. See also: June | July | August.
