Best time to visit Dunkerque
Best months

May and September. May has long daylight, fewer rain days than April, and the town isn't overrun. September is still mild (17°C avg), the sea is at i…

Best value

June and September. June has good weather but the main French holiday season hasn't started. September rates drop 20–30% and the…

Go in late May for decent weather and quiet streets, or early September for warmish days and cheaper rooms.

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