Tokyo's winters are cool and temperamental, with temperatures often fluctuating wildly between freezing and mild. January is typically the coldest month, with average highs struggling to reach above 4°C. As spring arrives in March, temperatures rise steadily, reaching a pleasant average of 12°C by the end of the month. Summer months from June to August bring sweltering heat, with July and August often seeing highs soar above 35°C. Autumn sees a gradual cooling, with temperatures dropping back down into the mild range come November.