In December, Turku typically sees daytime highs of -0.8°C and overnight lows around -5.7°C. Compared to the annual average high of 8.4°C, December runs -9.1°C.
December in Turku averages a daytime high of -0.8°C and an overnight low of -5.7°C.
December runs -9.1°C compared to Turku's annual average high of 8.4°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near -0.8°C and cooler evenings around -5.7°C.