S
M
T
W
T
F
S
30
83°
65°
31
78°
57°
1
78°
56°
2
75°
57°
3
77°
56°
4
79°
57°
5
80°
56°
6
74°
53°
7
76°
61°
8
79°
61°
9
81°
60°
10
76°
58°
11
77°
60°
12
81°
59°
13
74°
56°
14
73°
56°
15
77°
59°
16
80°
59°
17
80°
58°
18
79°
54°
19
71°
50°
20
70°
54°
21
74°
55°
22
73°
54°
23
77°
50°
24
67°
46°
25
67°
46°
26
66°
47°
27
66°
46°
28
68°
53°
29
73°
54°
30
73°
53°
1
72°
46°
2
64°
43°
3
64°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Dunkirk
Dunkirk's September 2026 forecast shows daily high temperatures ranging from 64° to 83°, with overnight lows between 43° and 65°. The average high for September is 74° with an average low of 54°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Dunkirk. See also: October | November | December.
