In December, Sundsvall typically sees daytime highs of -2.6°C and overnight lows around -8.3°C. Compared to the annual average high of 7.5°C, December runs -10.0°C.
December in Sundsvall averages a daytime high of -2.6°C and an overnight low of -8.3°C.
December runs -10.0°C compared to Sundsvall's annual average high of 7.5°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near -2.6°C and cooler evenings around -8.3°C.