In December, Iwata typically sees daytime highs of 12.5°C and overnight lows around 4.3°C. Compared to the annual average high of 20.0°C, December runs -7.5°C.
December in Iwata averages a daytime high of 12.5°C and an overnight low of 4.3°C.
December runs -7.5°C compared to Iwata's annual average high of 20.0°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 12.5°C and cooler evenings around 4.3°C.