In August, Heidelberg typically sees daytime highs of 20.9°C and overnight lows around 2.5°C. Compared to the annual average high of 23.2°C, August runs -2.3°C.
August in Heidelberg averages a daytime high of 20.9°C and an overnight low of 2.5°C.
August runs -2.3°C compared to Heidelberg's annual average high of 23.2°C, ranking #9 of 12 months by warmth.
Plan for daytime highs near 20.9°C and cooler evenings around 2.5°C.