In Sennan, Japan's climate is mild with distinct seasonal variations. Winters are cool and occasionally chilly, with temperatures ranging from just below freezing to the mid-teens Celsius in January and December. As spring approaches, temperatures rise gradually, reaching highs of up to 27 degrees Celsius by April. Summers are hot and humid, with temperatures often soaring above 30 degrees Celsius from June to August. Autumn brings a welcome respite, with temperatures cooling down significantly by October, returning to more moderate levels by November.