S
M
T
W
T
F
S
26
56°
47°
27
54°
45°
28
53°
45°
29
53°
47°
30
54°
48°
1
56°
49°
2
55°
48°
3
54°
49°
4
56°
48°
5
54°
47°
6
55°
48°
7
55°
50°
8
58°
50°
9
59°
49°
10
56°
50°
11
56°
50°
12
58°
49°
13
59°
51°
14
58°
51°
15
57°
48°
16
57°
48°
17
58°
52°
18
62°
47°
19
62°
47°
20
59°
49°
21
60°
52°
22
61°
51°
23
58°
50°
24
60°
51°
25
62°
51°
26
60°
50°
27
61°
53°
28
62°
52°
29
61°
52°
30
61°
51°
31
62°
49°
1
63°
50°
2
62°
53°
3
63°
53°
4
60°
52°
5
60°
52°
6
62°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Callington
Callington's May 2026 forecast shows daily high temperatures ranging from 53° to 63°, with overnight lows between 45° and 54°. The average high for May is 58° with an average low of 50°. 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 Callington. See also: June | July | August.