In September, Chelm typically sees daytime highs of 18.4°C and overnight lows around 8.2°C. Compared to the annual average high of 11.6°C, September runs +6.8°C.
September in Chelm averages a daytime high of 18.4°C and an overnight low of 8.2°C.
September runs +6.8°C compared to Chelm's annual average high of 11.6°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 18.4°C and cooler evenings around 8.2°C.