Winters in Tokorozawa are cold and variable, with temperatures often dropping below freezing in January and December, but also experiencing milder periods up to 18°C. Spring brings a steady warming trend, with temperatures rising steadily from around 4°C in April to 24°C by March's end. Summers are hot and humid, with temperatures frequently reaching above 30°C, especially in July and August. Autumn is mild, with temperatures gradually cooling down after the sweltering summer months, but still experiencing occasional warm spells up to 22°C.