Kawagoe's winters are chilly, with temperatures often below freezing in January and December, but can occasionally spike to mild highs around 18-22°C. Spring brings gradual warming, with March and April experiencing a steady rise in temperature, while May is marked by a significant increase, averaging above 19°C. Summer months of June, July, and August are hot, with temperatures frequently reaching the mid-to-high 30s Celsius. Autumn sees a return to cooler conditions, with September and October offering mild temperatures before winter's chill returns.