S
M
T
W
T
F
S
26
63°
48°
27
64°
48°
28
61°
48°
29
61°
39°
30
57°
34°
1
52°
39°
2
54°
30°
3
59°
37°
4
75°
45°
5
55°
48°
6
57°
43°
7
61°
37°
8
61°
46°
9
73°
50°
10
66°
46°
11
70°
39°
12
79°
39°
13
61°
41°
14
66°
37°
15
68°
45°
16
79°
59°
17
84°
59°
18
84°
64°
19
82°
64°
20
67°
49°
21
68°
49°
22
66°
59°
23
72°
57°
24
75°
58°
25
76°
57°
26
77°
60°
27
80°
61°
28
81°
62°
29
79°
63°
30
80°
62°
31
79°
62°
1
78°
61°
2
79°
56°
3
80°
62°
4
79°
61°
5
77°
58°
6
74°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Dunkirk
Dunkirk's May 2026 forecast shows daily high temperatures ranging from 66° to 81°, with overnight lows between 49° and 63°. The average high for May is 76° with an average low of 58°. 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 Dunkirk. See also: June | July | August.