In December, Nagaoka typically sees daytime highs of 7.7°C and overnight lows around -0.1°C. Compared to the annual average high of 17.7°C, December runs -10.0°C.
December in Nagaoka averages a daytime high of 7.7°C and an overnight low of -0.1°C.
December runs -10.0°C compared to Nagaoka's annual average high of 17.7°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 7.7°C and cooler evenings around -0.1°C.