In April, Olsztyn typically sees daytime highs of 11.8°C and overnight lows around 1.2°C. Compared to the annual average high of 11.0°C, April runs +0.8°C.
April in Olsztyn averages a daytime high of 11.8°C and an overnight low of 1.2°C.
April runs +0.8°C compared to Olsztyn's annual average high of 11.0°C, ranking #6 of 12 months by warmth.
Plan for daytime highs near 11.8°C and cooler evenings around 1.2°C.