Despite its location in the tropics, Guatemala City's relatively high altitude moderates average temperatures. The city has a tropical savanna climate (Köppen ''Aw'') bordering on a subtropical highland climate (''Cwb''). Guatemala City is generally very warm, almost springlike, throughout the course of the year. It occasionally gets hot during the dry season, but not as hot and humid as in Central American cities at sea level. The hottest month is April. The rainy season extends from May to October, coinciding with the tropical storm and hurricane season in the western Atlantic Ocean and Caribbean Sea, while the dry season extends from November to April. The city can at times be windy, which also leads to lower ambient temperatures.