In June, Iwamizawa typically sees daytime highs of 19.9°C and overnight lows around 10.7°C. Compared to the annual average high of 11.4°C, June runs +8.5°C.
June in Iwamizawa averages a daytime high of 19.9°C and an overnight low of 10.7°C.
June runs +8.5°C compared to Iwamizawa's annual average high of 11.4°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 19.9°C and cooler evenings around 10.7°C.