In December, Katori-shi typically sees daytime highs of 11.3°C and overnight lows around 1.5°C. Compared to the annual average high of 18.8°C, December runs -7.5°C.
December in Katori-shi averages a daytime high of 11.3°C and an overnight low of 1.5°C.
December runs -7.5°C compared to Katori-shi's annual average high of 18.8°C, ranking #10 of 12 months by warmth.
Plan for daytime highs near 11.3°C and cooler evenings around 1.5°C.