Bolivia's climate varies drastically with altitude and from one climatic zone to another. It ranges from humid and tropical to cold and semiarid. In most parts of the country winters are dry and summers are somewhat wet. Despite its tropical latitude, the altitude of cities like La Paz keeps things cool, and warm clothing is advised year-round. The summer months in Bolivia are November through March. The weather is typically warmer and wetter during these months. April through October, the winter months, are typically colder and drier.