In September, Dunkerque typically sees daytime highs of 18.2°C and overnight lows around 12.0°C. Compared to the annual average high of 12.9°C, September runs +5.4°C.
September in Dunkerque averages a daytime high of 18.2°C and an overnight low of 12.0°C.
September runs +5.4°C compared to Dunkerque's annual average high of 12.9°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 18.2°C and cooler evenings around 12.0°C.