In September, Slawi typically sees daytime highs of 31.9°C and overnight lows around 23.1°C. Compared to the annual average high of 31.0°C, September runs +0.9°C.
September in Slawi averages a daytime high of 31.9°C and an overnight low of 23.1°C.
September runs +0.9°C compared to Slawi's annual average high of 31.0°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 31.9°C and cooler evenings around 23.1°C.