The Climate  of  Peru
All About
La Selva
La Sierra

Click on the map below to see what the weather is doing in

the largest cities in Peru.

Peru is found on the west coast of South America with the Andes Mountains to the
east and the Pacific Ocean to the west. Its northern tip barely reaches to the Equator. It is mostly a tropical country.

Its three regions, the coast, the Andes Mountains and the tropical jungle each have very different weather patterns and climates.

The coast (La Costa) has a dry, mild climate because the prevailing winds blow from east to west over the Andes to the Pacific Ocean. Most of the rainfall occurs on the eastern slopes of the mountains. Only dry air is left as the winds come down from the Andes to the coast.

The coastline of Peru south of Lima has large sand dunes meeting the Pacific Ocean

The Amazon rainforest of South America covers an area almost the size of the entire United States. There could be as many as 6000 different kinds of plants in this region.

The cold ocean Humboldt Current also cools down the coastal area by bringing cooler temperatures up from Antarctica.

The Andes Mountains (La Sierra) are mostly cool or even cold because of the high altitude.  The amount of rainfall depends on whether the location is on the eastern or western side of the mountain range. The eastern side (windward) receives more rainfall than the western side (leeward.)

Animals like llamas, alpacas and vicunas are quite comfortable in this environment.

The rainforest in the northeast (La Selva) and on the eastern side of the Andes Mountains (La Montaña) is hot and humid with heavy rainfall, especially in the months from December to March - summer in the southern hemisphere. The temperatures in these areas are warm all year round. Most of the  rainforest area has an annual rainfall of over 200 cm.

Rainforest animals of Peru are abundant, and include many kinds of birds, amphibians, reptiles and mammals such as capybaras, tapirs, jaguars and several species of new world monkeys.

Heavy rains, lush forests and fast flowing rivers make up the Selva region.

This graph shows the amount of precipitation that falls on a rainforest city in Peru (Iquitos), a coastal city in Peru (Lima) and a city in southern Alberta (Lethbridge) during an average month of the year in summer and in winter.

How would having a lot of rain or snow in a month make life easier or more difficult for the people living there?

How does the amount of precipitation affect the clothes people wear?

How people travel? The houses people live in?

What else might be different in a dry climate compared to a wet one?

La Costa
Click the city names above for more data
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