In the highlands, including Cusco, the dry season lasts from April to October, when it is usually warm and sunny, although nights can be cold. Weather is more changeable in March and November, and rain is more common, although temperatures are higher. The rainy season is at its heaviest from December to February.
On the coast, including Lima, it is warm and humid for much of the year, with overcast skies broken by occasional sunshine from April to November. December to March is usually sunny. Rain is rare at any time of the year.