According to its geographical location, (tropical region of the
southern hemisphere), Peru should have a warm, humid and rainy
climate; however; the presence of the Andes Mountain Range,
the anticyclonic circulation of the South Pacific, and the cold Humbolt
current have shaped the environmental conditions, creating a
signifcant variety of climates.

It almost never rains on the coast, characterized by thick fogs and
light drizzle between May and November, producing a cold sensation
although the average annual temperature fluctuates between 14ºC
and 18ºC (57°F and 64°F). In the summer (December-April), humidity
decreases and the sun shines brightly.

Both in the sierra and in the jungle there is a dry season (May
-October), plenty of sunny days, and a rainy season between
December and March (winter). While the sierra has a fresh and dry
climate with annual average temperatures fluctuating between 9ºC
and 18ºC (48°F and 64°F), the jungle has a tropical climate with
temperatures oscillating between 26ºC and 40ºC (79°F and 104°F).

The climate In the Andean valleys is generally dry and warm almost
all year long, with some rain during the summer.