S
M
T
W
T
F
S
26
64°
49°
27
72°
52°
28
63°
52°
29
65°
44°
30
59°
39°
1
53°
42°
2
52°
34°
3
62°
38°
4
76°
52°
5
68°
45°
6
58°
44°
7
61°
38°
8
69°
51°
9
76°
55°
10
68°
51°
11
72°
42°
12
77°
40°
13
62°
45°
14
64°
45°
15
66°
58°
16
75°
62°
17
83°
63°
18
85°
66°
19
74°
57°
20
72°
52°
21
67°
50°
22
70°
51°
23
70°
54°
24
76°
56°
25
77°
61°
26
79°
59°
27
76°
54°
28
75°
59°
29
76°
59°
30
76°
56°
31
71°
54°
1
72°
52°
2
72°
51°
3
73°
52°
4
73°
56°
5
80°
62°
6
82°
63°
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 64° to 85°, with overnight lows between 45° and 66°. The average high for May is 74° with an average low of 56°. 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.