In September, Heidenheim an der Brenz typically sees daytime highs of 18.2°C and overnight lows around 8.0°C. Compared to the annual average high of 11.8°C, September runs +6.4°C.
September in Heidenheim an der Brenz averages a daytime high of 18.2°C and an overnight low of 8.0°C.
September runs +6.4°C compared to Heidenheim an der Brenz's annual average high of 11.8°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 18.2°C and cooler evenings around 8.0°C.