In May, Sundsvall typically sees daytime highs of 12.6°C and overnight lows around 2.4°C. Compared to the annual average high of 7.5°C, May runs +5.1°C.
May in Sundsvall averages a daytime high of 12.6°C and an overnight low of 2.4°C.
May runs +5.1°C compared to Sundsvall's annual average high of 7.5°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 12.6°C and cooler evenings around 2.4°C.