In August, Heidelberg typically sees daytime highs of 23.8°C and overnight lows around 13.0°C. Compared to the annual average high of 14.2°C, August runs +9.6°C.
August in Heidelberg averages a daytime high of 23.8°C and an overnight low of 13.0°C.
August runs +9.6°C compared to Heidelberg's annual average high of 14.2°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 23.8°C and cooler evenings around 13.0°C.