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
55°
43°
16
42°
34°
17
50°
34°
18
56°
37°
19
62°
39°
20
62°
42°
21
62°
41°
22
60°
43°
23
68°
47°
24
67°
46°
25
67°
44°
26
62°
43°
27
62°
46°
28
68°
48°
29
78°
53°
30
63°
46°
31
64°
44°
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 42° to 78°, with overnight lows between 34° and 53°. The average high for May is 64° 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.
