In May, Olsztyn typically sees daytime highs of 17.4°C and overnight lows around 5.7°C. Compared to the annual average high of 11.0°C, May runs +6.4°C.
May in Olsztyn averages a daytime high of 17.4°C and an overnight low of 5.7°C.
May runs +6.4°C compared to Olsztyn's annual average high of 11.0°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 17.4°C and cooler evenings around 5.7°C.