In December, Omihachiman typically sees daytime highs of 9.8°C and overnight lows around 1.5°C. Compared to the annual average high of 18.7°C, December runs -8.9°C.
December in Omihachiman averages a daytime high of 9.8°C and an overnight low of 1.5°C.
December runs -8.9°C compared to Omihachiman's annual average high of 18.7°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 9.8°C and cooler evenings around 1.5°C.