In September, Wilhelmshaven typically sees daytime highs of 17.7°C and overnight lows around 10.5°C. Compared to the annual average high of 11.8°C, September runs +5.9°C.
September in Wilhelmshaven averages a daytime high of 17.7°C and an overnight low of 10.5°C.
September runs +5.9°C compared to Wilhelmshaven's annual average high of 11.8°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 17.7°C and cooler evenings around 10.5°C.