In December, Iwaki typically sees daytime highs of 7.2°C and overnight lows around 0.2°C. Compared to the annual average high of 15.3°C, December runs -8.0°C.
December in Iwaki averages a daytime high of 7.2°C and an overnight low of 0.2°C.
December runs -8.0°C compared to Iwaki's annual average high of 15.3°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 7.2°C and cooler evenings around 0.2°C.