Ushiku's climate is characterized by distinct seasonal changes. Winters are cold, with temperatures often below freezing in January and February, but gradually warming up towards spring. Spring brings mild temperatures, with April and May enjoying pleasant highs around 20-30°C. Summers are hot and humid, with July and August experiencing sweltering highs above 35°C. Autumn returns to milder conditions, with September and October temperatures similar to those in late spring.