Seoul has four clear seasons. Spring (April and May) and autumn (September to November) are the most popular times to visit. Cherry blossom season in late March and early April draws crowds to Yeouido Park and Namsan Mountain paths. The timing shifts each year; the Korea Tourism Organization publishes annual bloom date predictions. Autumn brings red and gold foliage to Bukhansan National Park and Changdeokgung's Secret Garden, cooler temperatures around 12C to 20C, and the Seoul Lantern Festival on the Cheonggyecheon Stream in November. July and August are hot and humid, 28C to 33C, with the East Asian summer monsoon (jangma) bringing consistent rain from late June to late July. The monsoon can cause street flooding in some districts. December and January are cold, -5C to 3C. Ski resorts within 90 minutes of Seoul (Yongpyong, Bears Town) are fully active. The city's covered shopping districts, jjimjilbang (Korean saunas), and traditional Korean cuisine venues provide warm refuge in winter.