In December, Suwa typically sees daytime highs of 4.0°C and overnight lows around -4.8°C. Compared to the annual average high of 13.6°C, December runs -9.6°C.
December in Suwa averages a daytime high of 4.0°C and an overnight low of -4.8°C.
December runs -9.6°C compared to Suwa's annual average high of 13.6°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 4.0°C and cooler evenings around -4.8°C.