In August, Sundsvall typically sees daytime highs of 18.8°C and overnight lows around 9.6°C. Compared to the annual average high of 7.5°C, August runs +11.3°C.
August in Sundsvall averages a daytime high of 18.8°C and an overnight low of 9.6°C.
August runs +11.3°C compared to Sundsvall's annual average high of 7.5°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 18.8°C and cooler evenings around 9.6°C.