Chiyoda-ku's winters are chilly, with temperatures often below freezing in January and December, but February brings a brief respite. Spring arrives in March, gradually warming up to comfortable highs by April, which is also one of the wettest months. Summer is hot and humid, with July and August being the warmest months, while September brings a welcome drop in temperature. Autumn is mild, with temperatures ranging from cool to pleasant until November, when it starts to cool down again.