S
M
T
W
T
F
S
30
90°
68°
31
87°
69°
1
98°
73°
2
88°
70°
3
91°
71°
4
91°
71°
5
82°
65°
6
85°
60°
7
80°
62°
8
83°
67°
9
87°
70°
10
89°
71°
11
80°
66°
12
80°
64°
13
84°
65°
14
86°
67°
15
85°
66°
16
82°
58°
17
79°
61°
18
78°
59°
19
79°
60°
20
77°
57°
21
81°
62°
22
78°
61°
23
74°
61°
24
74°
60°
25
75°
60°
26
79°
59°
27
78°
59°
28
78°
58°
29
77°
60°
30
79°
59°
1
78°
59°
2
76°
58°
3
77°
57°
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 74° to 89°, with overnight lows between 57° and 71°. The average high for September is 80° with an average low of 62°. 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.
