In October, Iwamizawa typically sees daytime highs of 14.9°C and overnight lows around 4.2°C. Compared to the annual average high of 11.4°C, October runs +3.5°C.
October in Iwamizawa averages a daytime high of 14.9°C and an overnight low of 4.2°C.
October runs +3.5°C compared to Iwamizawa's annual average high of 11.4°C, ranking #6 of 12 months by warmth.
Plan for daytime highs near 14.9°C and cooler evenings around 4.2°C.