Part of the East Asian Monsoon region, South Korea has a temperate climate with four distinct seasons. The movement of air masses from the Asian continent exerts a greater influence on South Korea's weather than does air movement from the Pacific Ocean. Winters are usually long, cold, and dry, whereas summers are short, hot, and humid. Spring and autumn are pleasant but short in duration. Seoul's mean temperature in January is ; in July the mean temperature is about . Because of its southern and seagirt location, Jeju Island has warmer and milder weather than other parts of South Korea. Mean temperatures on Jeju range from in January to in July.