In January, Sayama typically sees daytime highs of 8.9°C and overnight lows around -1.8°C. Compared to the annual average high of 19.4°C, January runs -10.5°C.
January in Sayama averages a daytime high of 8.9°C and an overnight low of -1.8°C.
January runs -10.5°C compared to Sayama's annual average high of 19.4°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near 8.9°C and cooler evenings around -1.8°C.