S
M
T
W
T
F
S
30
72°
66°
31
79°
66°
1
82°
74°
2
88°
69°
3
81°
69°
4
76°
68°
5
75°
57°
6
75°
53°
7
75°
47°
8
77°
49°
9
84°
72°
10
76°
67°
11
72°
50°
12
80°
49°
13
79°
55°
14
67°
50°
15
77°
64°
16
78°
64°
17
73°
58°
18
74°
55°
19
72°
58°
20
67°
55°
21
70°
53°
22
69°
55°
23
69°
55°
24
71°
54°
25
74°
55°
26
73°
50°
27
73°
56°
28
75°
55°
29
73°
54°
30
69°
54°
1
71°
56°
2
73°
54°
3
69°
53°
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 67° to 79°, with overnight lows between 50° and 64°. The average high for September is 72° with an average low of 55°. 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.
