Varies according to area. On the coast winter lasts from June to September. During this period, the mountainous areas are often sunny during the day but cold at night. This is high tourist season and the best time to visit most regions. Heavy rains in the mountains and jungle last from December to April. It hardly ever rains in Lima nor most of the coast, except for Tumbes and Piura, which have tropical climates.

Lightweights during summer with much warmer clothes worn in upland areas, especially at night. Medium weights are advised during cooler months. Rain gear is recommended during the rainy season, particularly in the Andes or Amazon.