Peru’s southern hemisphere location dictates that its dry summers are from December to March and its wet winter months run between April and November. Its dynamic landscape means there are regional variations to consider. The coastal region is hot and sunny during summer, while the winter period is characterized by cooler temperatures, though still humid, and a hazy mist is a frequent occurrence. Year-round the waters are cool to cold and only get comfortably warm in the most northern coastal areas.

In the Andes, the best time to go trekking is from June to September when the area is at its driest though the nights can get distinctively cool. The Amazon jungle is at its best from May to September after the heavy rains have subsided and the water levels have dropped making it easier to access remote areas by boat and catch sight of rare wildlife.