Iwakura experiences a temperate climate with distinct seasonal changes. Winters are cool, with temperatures often below freezing in January and February, but mild by March. Springs arrive in April, bringing warmer temperatures that steadily rise throughout the month, setting the stage for hot summers. July and August are the hottest months, with average highs reaching 27-28°C, while September brings a welcome cooldown. Autumn sees a return to milder temperatures, similar to those of spring, before winter's chill sets in again.