In May, Berwyn typically sees daytime highs of 21.3°C and overnight lows around 9.3°C. Compared to the annual average high of 14.7°C, May runs +6.6°C.
May in Berwyn averages a daytime high of 21.3°C and an overnight low of 9.3°C.
May runs +6.6°C compared to Berwyn's annual average high of 14.7°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 21.3°C and cooler evenings around 9.3°C.