Bunkyo-ku experiences a temperate climate with distinct seasonal variations. Winters are chilly, with January and February temperatures often below freezing, but by March the mercury rises significantly, signaling the approach of spring. As April arrives, mild temperatures prevail, setting the stage for warm May and June days that frequently reach into the mid-30s. The sweltering heat of July and August brings humid summers, followed by a gradual cooling in September as autumn sets in. Autumn's crisp air returns by November, with winter's chill once again taking hold by December.