In September, Karlsruhe typically sees daytime highs of 20.7°C and overnight lows around 10.2°C. Compared to the annual average high of 14.5°C, September runs +6.2°C.
September in Karlsruhe averages a daytime high of 20.7°C and an overnight low of 10.2°C.
September runs +6.2°C compared to Karlsruhe's annual average high of 14.5°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 20.7°C and cooler evenings around 10.2°C.