In December, Ishioka typically sees daytime highs of 11.2°C and overnight lows around 0.4°C. Compared to the annual average high of 18.7°C, December runs -7.6°C.
December in Ishioka averages a daytime high of 11.2°C and an overnight low of 0.4°C.
December runs -7.6°C compared to Ishioka's annual average high of 18.7°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 11.2°C and cooler evenings around 0.4°C.