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Weather Guide: Los Alerces National Park

Nestled in the Patagonian Andes, Los Alerces National Park experiences a classic Andean Patagonian climate characterized by significant rainfall, strong winds, and distinct seasonal variations. Prepare for unpredictable weather, where sunny mornings can quickly turn into blustery, rainy afternoons, making layering essential.

Climate: Temperate OceanicElevation: 700m

Overview

Los Alerces National Park boasts a temperate oceanic climate, heavily influenced by its position along the Andes mountain range. Summers (December-February) are mild with pleasant temperatures but can be very windy. Winters (June-August) are cold, with regular snowfall and freezing temperatures, transforming the landscape into a pristine white wonderland. Spring and autumn offer transition periods with fluctuating weather, stunning fall foliage, and blossoming flora respectively, though strong winds are a constant companion year-round.

Monthly Weather

January

Peak
22°
8°
10 rainy days|0 snow days|8 hrs sun|50 km/h

January is peak summer, offering the warmest temperatures and longest daylight hours, ideal for outdoor activities. While generally pleasant, strong Patagonian winds are ever-present, and sudden rain showers can occur. The park is at its most vibrant, teeming with life and lush greenery.

February

High
21°
7°
9 rainy days|0 snow days|7 hrs sun|48 km/h

Still very much summer, February offers similar conditions to January but with slightly fewer crowds towards the end of the month. Temperatures remain mild, perfect for exploring, though strong winds and occasional rain remain characteristic of the Patagonian weather. The days are still long, allowing for extensive outdoor adventures.

March

Moderate
18°
5°
11 rainy days|0 snow days|6 hrs sun|45 km/h

March marks the beginning of autumn, bringing cooler temperatures and stunning fall foliage as the leaves begin to change into vibrant reds and golds. The winds can still be strong, and rainfall tends to increase. It's a beautiful time for photography and hiking without the intense summer crowds.

April

Low
13°
3°
12 rainy days|0 snow days|5 hrs sun|40 km/h

Autumn is in full swing, with crisp air and brilliant autumnal colors dominating the landscape. Temperatures drop significantly, and the chance of rain or even an early season snowfall increases, especially towards the end of the month. Many services may start to close for the winter season.

May

Low
8°
0°
13 rainy days|2 snow days|4 hrs sun|35 km/h

May brings distinctly cold weather, with temperatures often hovering around freezing. The landscape begins its transformation into winter, with increasing chances of significant snowfall, particularly in higher elevations. Many trails may become inaccessible, and visitor numbers are very low.

June

Low
4°
-2°
14 rainy days|7 snow days|3 hrs sun|30 km/h

June marks the beginning of winter, with cold temperatures and frequent snowfall transforming the park into a stunning, snow-covered wilderness. Many park roads and services will be closed. This month is suitable for experienced winter enthusiasts seeking solitude and pristine snowy landscapes.

July

Low
3°
-3°
13 rainy days|8 snow days|3 hrs sun|30 km/h

July is the coldest month, deep in the Patagonian winter. Expect significant snowfall, freezing temperatures, and very short daylight hours. The park is quiet, serene, and incredibly beautiful under a blanket of snow. Winter sports like snowshoeing or cross-country skiing are possible in accessible areas.

August

Low
5°
-2°
12 rainy days|6 snow days|4 hrs sun|32 km/h

Winter continues in August, with cold temperatures and continued snowfall, though the days start to gradually lengthen. It's still a challenging time for visitation due to road closures and cold, but offers the magic of a pristine winter landscape. Wildlife viewing can be good for certain species.

September

Low
9°
1°
11 rainy days|3 snow days|5 hrs sun|38 km/h

September heralds the arrival of spring. While still cool, temperatures begin to rise, and snow starts to melt, opening up some trails. The landscape slowly awakens, with early wildflowers appearing. Winds begin to pick up again, and unpredictable weather is common.

October

Moderate
14°
3°
10 rainy days|1 snow days|6 hrs sun|42 km/h

October is a beautiful shoulder season month, with increasing temperatures and blooming wildflowers. While some higher trails might still have snow, most of the park becomes accessible. Strong Patagonian winds are notable, and expect a mix of sunny days and sudden rain showers.

November

Moderate
18°
5°
10 rainy days|0 snow days|7 hrs sun|47 km/h

As summer approaches, November offers increasingly pleasant temperatures and longer daylight hours. The park is lush and green, and all trails are typically open. It's an excellent month to visit before the peak season crowds arrive, though strong winds are a constant feature.

December

Peak
20°
7°
9 rainy days|0 snow days|8 hrs sun|52 km/h

December marks the beginning of summer and the peak tourist season. Expect warm, long days, perfect for all outdoor activities. However, the winds can be exceptionally strong, and brief, intense rain showers are always a possibility. The park is at its busiest and most accessible.

Best Time to Visit

The best time to visit Los Alerces National Park is during the Patagonian summer, from December to March. These months offer the mildest temperatures, longest daylight hours, and most accessible trails, ideal for hiking, boating, and exploring. Early autumn (March) is also highly recommended for its stunning fall foliage and fewer crowds.

Worst Time to Visit

The worst time to visit, especially for general tourism, is during the winter months from June to August. Temperatures are freezing, heavy snowfall is common, many roads and services are closed, and daylight hours are very short. While beautiful for winter sports enthusiasts, it's challenging for typical sightseers.

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Weather Warnings

Extreme Winds: Patagonia is renowned for its strong, often gale-force winds (often 40-100 km/h). Be prepared for sudden gusts that can make hiking challenging and increase the wind chill.

Sudden Weather Changes: The weather can change dramatically within hours, from bright sunshine to heavy rain or even snow, especially in spring and autumn. Always carry layers.

UV Radiation: Even on cloudy days, UV radiation can be very strong, particularly in summer. Use high SPF sunscreen, sunglasses, and a hat.

Mountain Hazards: Rapidly changing conditions, icy patches, and remote terrain require caution. Inform someone of your hiking plans and check park conditions.

Flash Flooding: Heavy rainfall, especially during warmer months or after snowmelt, can lead to swollen rivers and potential flash flooding in low-lying areas or near riverbeds.

Layering Guide

Dressing in layers is paramount for Los Alerces National Park. Start with a moisture-wicking base layer (synthetic or merino wool). Add an insulating mid-layer like a fleece jacket or a lightweight down vest. Your outer layer should be a waterproof and windproof shell jacket and pants to protect against rain and the relentless Patagonian winds. Always include a warm hat, gloves, and sturdy waterproof hiking boots, regardless of the season, as conditions can change rapidly.

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Frequently Asked Questions

How cold does it get in Los Alerces National Park?

In winter (June-August), average low temperatures range from -2°C to -3°C, but can drop significantly below freezing, especially at night or higher elevations. Even in summer, evenings can be cool, around 5-8°C.

Is it always windy in Patagonia?

Yes, strong winds are a defining characteristic of Patagonia, including Los Alerces National Park. While speeds vary, you should almost always expect wind, especially during spring and summer months (October-March), where gusts can exceed 80-100 km/h.

What kind of precipitation should I expect?

The park receives significant rainfall year-round, with an average of 9-14 rainy days per month. In winter (June-August), much of this precipitation falls as snow, often covering the landscape entirely.

Can I visit Los Alerces National Park in winter?

While technically possible, visiting in winter (June-August) is challenging due to road closures, limited services, and cold, snowy conditions. It's recommended only for experienced travelers equipped for severe winter weather or those interested in specific winter activities like snowshoeing or cross-country skiing in designated open areas.

Do I need sun protection even on cloudy days?

Absolutely. Due to the ozone layer's thinning over Patagonia and the high altitude, UV radiation can be very intense even on overcast days. Always use high SPF sunscreen, wear sunglasses, and a wide-brimmed hat.

Are there any specific weather-related dangers in the park?

The primary dangers are extreme winds that can cause falling trees or make walking difficult, sudden and rapid weather changes leading to hypothermia, and potential flash flooding near rivers after heavy rains. Always be prepared, check forecasts, and inform park rangers of your plans.

Los Alerces National Park

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