Winters in Annaka, Japan are cold and relatively short, with temperatures often below freezing from late December to early February. Spring brings rapid warming, with temperatures rising by as much as 10°C between March and May. Summers are warm and humid, with temperatures sometimes reaching over 35°C in July and August. Autumn is mild, with temperatures similar to those of spring, before cooling again into winter. The temperature fluctuations throughout the year are quite pronounced, but overall Annaka experiences a temperate climate with four distinct seasons.