Seoul has all four clearly distinguished seasons. Spring begins around early March; cherry blossom and flower festivals around the entire country signal the official coming of spring. The summer months can get quite hot and humid, but be ready for random spurts of coldness when stepping into a subway car, bus, or any other air-conditioned facilities in Seoul. For about a month starting from mid-July is the rainy season. Autumn start around September and boasts beautiful scenery as leaves begin to turn into fall colors. The winters in Seoul can get quite harsh. The temperature can drop as low as 15 degrees below zero (Celsius) during the coldest days.