In December, Tromso typically sees daytime highs of -1.1°C and overnight lows around -7.9°C. Compared to the annual average high of 5.9°C, December runs -7.0°C.
December in Tromso averages a daytime high of -1.1°C and an overnight low of -7.9°C.
December runs -7.0°C compared to Tromso's annual average high of 5.9°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near -1.1°C and cooler evenings around -7.9°C.