Weather Information from Peru

Peru is located in the southern tropics (latitudes 0º to 18º), but climate varies significantly according to season, altitude and region.

Lima & the coast

From May to October, Lima is often overcast, but with minimal precipitation. There are sunny spells, and it’s a fresh to pleasant 13-20ºC.
At the same time, inland areas and the north coast mid to high 20’s ºC.
November to April is generally warm and sunny and Lima enjoys warm temperature of 19-25ºC, with the coast averaging 22-30ºC.

The Andes

Climate depends largely on altitude. As a rule of thumb, below 2,000m climate is mild and above 2,000m warm clothing is required for evenings, nights and early mornings.
The Andean sun is very strong.
May to Oct (dry season in The Andes)
Cusco (3,300m): Average max/min temps: 22ºC /2ºC. Average 3 or 4 wet days per month.
Arequipa (2,380m): Average max/min temps: 26ºC /9ºC. Sunny more than 340 days/year with minimal precipitation.
On highland treks: Conditions are generally dry. However, at this time of year, expect a range of conditions within a single day: cold/freezing nights at camps above 4,000m, where pre-dawn temperatures can be -5ºC; warm, spring-like mornings and afternoons; and cold evenings.

Note that mountain weather can be fickle and localised, and that precipitation is not unknown in the dry season. Expect temperatures to swing between sun and shade, sheltered and exposed ground and with altitude gain and loss. A quick-setting sun means temperatures drop fast. In the cloud forest, e.g. around Machu Picchu, daytime conditions are generally warm or hot, and evenings cool.

Nov to March/April (wet season in The Andes)

Cusco: Average max/min temps: 23ºC /6ºC. Average 13 wet days per month.
Arequipa: Average max/min temps: 25ºC /14ºC.
On highland treks: Wetter conditions, with cooler days and milder nights than dry season. Jan-Mar usually the wettest months.

The Amazon rainforest

Year-round, weather conditions are hot and humid and there is always the risk of rain
There is a ‘dry season’ in Tambopata and Manu between May and October. The average daytime high temperature is between 25°C and 34°C and the average nighttime low is between 16°C and 22°C. Heavy downpours typically occur every few days.
Around 80% of annual average rainfall – approx 2,000 mm in Manu and Tambopata and 1,400 mm in Iquitos – occurs in the wet season Nov-April.
On rare occasions, between May and September, cold fronts from Argentina – ‘friajes’ – can sweep into southwest Amazonia and push temperatures down to 9° C. (Friajes usually last between 1 and 3 days).