Winters in Kashiwazaki are chilly, with temperatures often below freezing and averaging around 2-5°C. Spring arrives slowly, gradually warming up to averages of 8-11°C by March and April. Summer brings warm weather, with July and August temperatures sometimes reaching highs above 30°C, but still experiencing some cooler mornings and evenings. Autumn is mild, with September's temperatures mirroring those of June, before cooling down in October. Frosts can occur in winter months, while occasional heatwaves may strike during the summer.