In September, Bielsko-Biala typically sees daytime highs of 18.7°C and overnight lows around 8.0°C. Compared to the annual average high of 12.4°C, September runs +6.3°C.
September in Bielsko-Biala averages a daytime high of 18.7°C and an overnight low of 8.0°C.
September runs +6.3°C compared to Bielsko-Biala's annual average high of 12.4°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 18.7°C and cooler evenings around 8.0°C.