Yanagawa, Japan experiences a temperate climate with distinct seasonal changes. Winters are cool and variable, with temperatures fluctuating between freezing and mild days, averaging around 7-9°C in January and December. As spring approaches, temperatures gradually rise, reaching an average of 16°C in April and 20°C in May, with warmest days occasionally reaching up to 30-31°C. Summer months are hot and humid, with July being the hottest, while autumn brings a welcome coolness, returning to cooler temperatures by November.