Winters in Yotsukaido are quite chilly, with temperatures often below freezing and averaging around 5°C in January. Spring is a gradual warming period, with March being the first month to see significant temperature increases, averaging 12°C. Summer months bring hot temperatures, with July and August consistently reaching highs above 30°C. Autumn sees a cooling trend, with October experiencing a brief return to cooler temperatures before gradually warming up again in November. The year's coldest months are January and December, while the warmest months are June through August.