Ueda, Japan experiences a varied climate with distinct seasons. Winters are cold and snowy, with temperatures often below freezing from January to March, but February can bring unseasonably warm days. Spring arrives in April, bringing mild temperatures that gradually increase throughout the month, and May is characterized by warmer days and occasional heatwaves. Summers are hot and humid, with July and August being the hottest months, while September brings a slight cooling trend. Autumn is relatively cool and dry, with November often feeling chilly, before winter's chill returns in December.