In September, Mulhouse typically sees daytime highs of 20.8°C and overnight lows around 9.9°C. Compared to the annual average high of 14.7°C, September runs +6.2°C.
September in Mulhouse averages a daytime high of 20.8°C and an overnight low of 9.9°C.
September runs +6.2°C compared to Mulhouse's annual average high of 14.7°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 20.8°C and cooler evenings around 9.9°C.