In December, Koszalin typically sees daytime highs of 2.9°C and overnight lows around -3.0°C. Compared to the annual average high of 11.8°C, December runs -9.0°C.
December in Koszalin averages a daytime high of 2.9°C and an overnight low of -3.0°C.
December runs -9.0°C compared to Koszalin's annual average high of 11.8°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 2.9°C and cooler evenings around -3.0°C.