The temperatures in Dunkerque in September are usually low and can range between 14°C and 19°C.
You can expect about 3 to 8 days of rain in Dunkerque during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Dunkerque in September 2026.
If you’re planning to visit Dunkerque in the near future, we highly recommend that you review the 14 day weather forecast for Dunkerque before you arrive.
Temperatures
19° / 14°
Rainy Days
5
Snowy Days
0
Dry Days
25
Rainfall
73
mm
Sun Hours
9.7
Hrs
