In December, Kotka typically sees daytime highs of -0.5°C and overnight lows around -5.8°C. Compared to the annual average high of 7.6°C, December runs -8.2°C.
December in Kotka averages a daytime high of -0.5°C and an overnight low of -5.8°C.
December runs -8.2°C compared to Kotka's annual average high of 7.6°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near -0.5°C and cooler evenings around -5.8°C.