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°
34°
18
55°
38°
19
62°
39°
20
55°
39°
21
63°
41°
22
67°
47°
23
69°
42°
24
69°
46°
25
68°
44°
26
64°
42°
27
66°
45°
28
65°
45°
29
62°
44°
30
65°
46°
31
69°
41°
1
68°
46°
2
69°
47°
3
70°
48°
4
69°
47°
5
64°
47°
6
65°
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 70°, with overnight lows between 38° and 48°. The average high for May is 65° with an average low of 44°. 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.
