In September, Ostrowiec Swietokrzyski typically sees daytime highs of 18.6°C and overnight lows around 7.8°C. Compared to the annual average high of 12.0°C, September runs +6.6°C.
September in Ostrowiec Swietokrzyski averages a daytime high of 18.6°C and an overnight low of 7.8°C.
September runs +6.6°C compared to Ostrowiec Swietokrzyski's annual average high of 12.0°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 18.6°C and cooler evenings around 7.8°C.