Arakawa's winters are chilly, with temperatures often dipping below freezing in January and February, averaging around 4-7°C. Spring brings a welcome warmth, with March and April experiencing mild temperatures ranging from 12-26°C on average. Summer is hot and humid, with July and August being the warmest months, averaging highs of around 25-27°C. Autumn is mild, with September and October enjoying pleasant temperatures, before cooling down again in November and December, which see a return to chilly winter conditions.