In September, Den Helder typically sees daytime highs of 17.4°C and overnight lows around 11.5°C. Compared to the annual average high of 11.9°C, September runs +5.4°C.
September in Den Helder averages a daytime high of 17.4°C and an overnight low of 11.5°C.
September runs +5.4°C compared to Den Helder's annual average high of 11.9°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 17.4°C and cooler evenings around 11.5°C.