In December, Isahaya typically sees daytime highs of 11.1°C and overnight lows around 3.5°C. Compared to the annual average high of 19.3°C, December runs -8.2°C.
December in Isahaya averages a daytime high of 11.1°C and an overnight low of 3.5°C.
December runs -8.2°C compared to Isahaya's annual average high of 19.3°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 11.1°C and cooler evenings around 3.5°C.