In December, Tsushima typically sees daytime highs of 10.4°C and overnight lows around 2.3°C. Compared to the annual average high of 19.1°C, December runs -8.7°C.
December in Tsushima averages a daytime high of 10.4°C and an overnight low of 2.3°C.
December runs -8.7°C compared to Tsushima's annual average high of 19.1°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 10.4°C and cooler evenings around 2.3°C.