When does it get colder in Peru?

In Peru, cold weather is more intense during the winter months, which run from June to August. During this season, temperatures drop noticeably in the Andean regions and along the coast, with dense fog and chilly breezes. The central and southern highlands experience lower temperatures due to altitude.

Peru’s Climate Diversity

Coastal Climate

Coastal desert climate: Peru’s coast has a desert climate due to the influence of the Humboldt Current, which brings cold waters from the south and creates arid conditions. In cities like Lima, summers are warm with some humidity, while winters are cool and dry.

Variations by latitude: The northern coastal region, in areas near Tumbes and Piura, has a more tropical climate, with warmer temperatures and higher humidity throughout the year.

Highlands (Andes) Climate

Andean or mountain climate: This climate shows a considerable temperature variation between day and night. The year is divided into two periods: the rainy season (December to March) and the dry season (April to November).

Altitude and climate: The higher the altitude, the lower the temperature. Areas at higher elevations have colder climates, and the highest peaks may experience subglacial conditions.

Jungle (Amazon) Climate

Upper jungle (cloud forest): The climate is mild and humid, with steady rainfall throughout the year and a well-defined rainy season.

Lower jungle (Amazon Basin): A humid tropical climate characterizes this region, with frequent rainfall, especially between December and April.

Best time to visit Machu Picchu

Frost (Heladas) and Cold Snaps (Friaje) in Peru

What are “heladas” and when do they occur?

Frost events (“heladas”) are common in the Peruvian Andes, especially in areas located above 3,000 meters (9,843 ft) above sea level. During these events, temperatures can drop to 0°C (32°F) or below.

Regions most affected by frost

Frost events are frequent in Puno, Arequipa, Tacna, Moquegua, Cusco, Ayacucho, Huancavelica, Pasco, Junín, and Apurímac, where low temperatures significantly impact local communities.

What is “friaje” and how does it affect Peru?

“Friaje” occurs when cold air currents originating from Antarctica reach Peru’s Amazon region. This event causes a noticeable drop in temperatures and usually lasts between three and five days, especially affecting jungle areas.

The regions most affected by friaje include Madre de Dios, Puno, Ucayali, Huánuco, Junín, Pasco, and Loreto.

Impact of friaje on local temperatures

Response of wildlife and plants:

Native species adapted to warm climates may experience stress when facing unexpected cold temperatures. This shift can alter behavior and reduce the survival of vulnerable species. Tropical plants may suffer significant damage, affecting agriculture and natural ecosystems.

Impact on the local population:

Low temperatures increase the risk of respiratory illnesses such as pneumonia, especially in children and older adults. Agriculture and other outdoor economic activities may also be affected by temporary drops in temperature.

Which month is the coldest in Peru?

The coldest months are June and July. In some regions, cold weather can extend into September.

Cold weather in the highlands

Cold weather strongly affects Peru’s highlands, especially during the frost season. With high altitudes, this region experiences climate changes that impact residents’ daily life.

Extreme temperatures: During the frost season (June to August), nighttime temperatures can drop to 0°C (32°F) or lower, especially in areas above 3,500 meters (11,483 ft) above sea level.

Daily temperature swings: The Peruvian highlands have a wide temperature range between day and night. Early mornings can feel cold, but temperatures rise significantly when the sun comes out. Once the sun sets, temperatures drop quickly.

Coastal region and the northern zone

Climate along the coast and in northern Peru is mild and humid, mainly due to the influence of the Humboldt Current. This current lowers the temperature of the Pacific Ocean, creating a cooler environment along Peru’s coastline.

Constant humidity, along with temperature fluctuations, can affect people’s respiratory health, making asthma one of the most common conditions that can worsen under these weather conditions.

High humidity: Humidity is constant on the coast, particularly in cities like Lima, where it can exceed 80% year-round.

Temperature variations: Although temperatures are generally moderate, the mix of humidity and cold during winter months (June to September) can make the air feel colder than it actually is.

Jungle region

Tours to the Peruvian jungle

In Peru’s jungle region, also known as the Peruvian Amazon, crops and vegetation are influenced by the local climate, which is generally warm and humid. However, the friaje phenomenon can have a significant impact on this region, causing considerable damage to vegetation.

Humid tropical climate: A warm climate with high humidity prevails year-round, with abundant rainfall, especially during the rainy season (December to April).

High temperatures: Temperatures remain high, supporting the growth of dense and diverse vegetation.

The “Niño Costero” phenomenon and its influence

The “Niño Costero” phenomenon is a climate event that affects Pacific waters off the coasts of Peru and Ecuador. It is characterized by an abnormal warming of the sea surface in this area, which directly impacts local weather patterns. Unlike the global El Niño phenomenon, Niño Costero has more localized effects, but they can be equally significant. This event can disrupt weather conditions, causing changes in rainfall and temperatures and affecting both marine and terrestrial ecosystems.

Weather forecast by SENAMHI