Winters in Izunokuni are harsh, with temperatures often dropping below -30°C and averaging around 1-3°C. The cold weather persists into early spring, but by April the mercury rises, with average highs reaching 8°C. Summer is warm to hot, with July and August seeing average highs of 20-21°C, while September brings a slight cooldown. Autumn temperatures drop again, returning to averages similar to those seen in winter.