S
M
T
W
T
F
S
26
50°
35°
27
51°
36°
28
51°
38°
29
52°
37°
30
53°
38°
1
54°
37°
2
53°
39°
3
54°
38°
4
61°
44°
5
63°
38°
6
56°
37°
7
55°
40°
8
64°
47°
9
67°
46°
10
65°
43°
11
58°
40°
12
57°
40°
13
65°
46°
14
65°
46°
15
59°
48°
16
60°
49°
17
62°
49°
18
66°
42°
19
67°
46°
20
69°
44°
21
67°
46°
22
68°
45°
23
63°
47°
24
64°
45°
25
68°
47°
26
69°
48°
27
70°
48°
28
66°
49°
29
67°
49°
30
72°
52°
31
63°
51°
1
67°
51°
2
69°
53°
3
68°
53°
4
70°
51°
5
73°
54°
6
73°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Calais
Calais's May 2026 forecast shows daily high temperatures ranging from 50° to 73°, with overnight lows between 35° and 54°. The average high for May is 63° 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 Calais. See also: June | July | August.
