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Weather Guide: Perito Moreno Glacier

Prepare for a spectacular display of nature's power where towering ice meets dramatic Patagonian skies. The weather at Perito Moreno Glacier is renowned for its unpredictability and powerful winds, demanding readiness for all four seasons in a single day. Despite its southern latitude, temperatures are often milder than expected, though the wind chill can be formidable.

Updated for 2025–2026 Season
9 min read
Climate: Subpolar OceanicElevation: 200m
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Overview

The climate around Perito Moreno Glacier is classified as subpolar oceanic, heavily influenced by its proximity to the immense Southern Patagonian Ice Field. Expect cool to cold temperatures year-round, significant wind, and frequent precipitation, often changing from rain to snow even in shoulder seasons. The summer months bring longer daylight hours and slightly warmer conditions, while winter offers a stark, snow-draped landscape with fewer crowds. Layering is essential for comfort in this dynamic environment.

Monthly Weather

January

Peak
14°
5°
9 rainy days|0 snow days|8 hrs sun|80 km/h

January is the heart of summer, offering the longest daylight hours and relatively mild temperatures. However, powerful Patagonian winds are at their peak, making the perceived temperature much cooler. Expect a mix of sunny periods and sudden showers.

February

Peak
13°
4°
9 rainy days|0 snow days|7 hrs sun|75 km/h

February continues the summer season with pleasant temperatures and long days, though winds remain strong. This is another popular month for visitors due to the favorable conditions for glacier viewing and other outdoor activities. Be prepared for sudden weather shifts.

March

High
11°
3°
10 rainy days|1 snow days|6 hrs sun|65 km/h

March marks the beginning of autumn, with temperatures starting to cool, though still comfortable. The fierce winds begin to subside slightly, and the surrounding Lenga forests may start displaying their vibrant fall colors. Light snow showers become possible.

April

Moderate
8°
1°
12 rainy days|3 snow days|4 hrs sun|50 km/h

April brings cooler, distinctly autumnal weather to Perito Moreno Glacier. The days shorten, and the chances of rain and snow increase, offering a dramatic, often moody atmosphere. Winds continue to lessen compared to summer, but remain a factor.

May

Low
5°
-1°
13 rainy days|6 snow days|3 hrs sun|45 km/h

May transitions into winter, with consistently cold temperatures and increasing snowfall. Daylight hours are significantly shorter, and while the landscape becomes more stark, the fewer crowds offer a more solitary experience. Expect crisp air and potentially icy conditions.

June

Low
2°
-3°
14 rainy days|10 snow days|2 hrs sun|40 km/h

June is the beginning of winter, characterized by the shortest days, lowest temperatures, and highest likelihood of snow. The landscape is often blanketed in white, providing a unique and serene experience, albeit a cold one. Conditions can be challenging.

July

Low
2°
-4°
13 rainy days|11 snow days|2 hrs sun|40 km/h

July is typically the coldest month at Perito Moreno Glacier, with freezing temperatures and frequent snowfall. While challenging, the winter months offer incredible photographic opportunities of the glacier amidst a pristine, snowy environment and minimal visitor numbers. Conditions require careful planning.

August

Low
3°
-3°
12 rainy days|9 snow days|3 hrs sun|45 km/h

August sees a slight easing of winter's grip, with temperatures remaining cold but gradually beginning to rise towards the end of the month. Snowfall is still common, but the days slowly start to lengthen, hinting at the approaching spring. Conditions remain distinctly wintry.

September

Moderate
6°
0°
11 rainy days|5 snow days|5 hrs sun|55 km/h

September heralds the arrival of spring, with a noticeable increase in daylight hours and a gradual rise in temperatures. While snow is still possible, especially earlier in the month, conditions become more variable. Winds begin to pick up again after the winter lull.

October

High
9°
1°
10 rainy days|2 snow days|6 hrs sun|65 km/h

October is a classic spring month, offering longer days and increasingly pleasant, though still cool, temperatures. The Patagonian winds begin to strengthen significantly. It's a great time to visit before the peak summer crowds arrive, with the landscape reawakening.

November

High
11°
3°
9 rainy days|1 snow days|7 hrs sun|70 km/h

November is the late spring, moving into early summer, with temperatures becoming quite pleasant and daylight hours extending considerably. Winds are consistently strong, characteristic of Patagonia. This is an excellent month for exploring the glacier before the absolute peak season.

December

Peak
13°
4°
8 rainy days|0 snow days|8 hrs sun|75 km/h

December kicks off the summer season, bringing the longest days of the year and the highest temperatures. While relatively 'warm' for Patagonia, the powerful winds make it feel much cooler. This is peak tourist season, offering fantastic conditions for viewing the glacier.

Best Time to Visit

The best time to visit Perito Moreno Glacier is during the Austral summer and shoulder seasons, from October to April. December, January, and February offer the warmest temperatures, longest daylight hours, and generally best access, though winds are strongest. Shoulder months like October, November, March, and April provide a good balance of reasonable weather, slightly fewer crowds, and stunning autumn colors in March/April.

Worst Time to Visit

The worst time to visit is typically during the depths of Austral winter, from June to August. While offering a stark, serene beauty and very few crowds, temperatures are at their lowest, snowfall is frequent, and daylight hours are very short. Some excursions may be limited, and navigating the elements requires robust winter gear and tolerance for extreme cold.

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Weather Warnings

Extreme Winds: Patagonia is infamous for its strong, sustained winds, particularly during summer (Dec-Feb) when they can exceed 100 km/h. These winds can make even mild temperatures feel much colder and can disrupt travel plans.

Sudden Weather Changes: Conditions can shift rapidly from sunshine to rain or even snow within hours, regardless of the season. Always be prepared for all types of weather.

UV Radiation: Despite often cool temperatures, the high altitude and proximity to the ozone hole mean UV radiation can be very strong. Always use high-SPF sunscreen, wear sunglasses, and a hat.

Snow and Ice (Winter): During winter months (June-August), heavy snowfall and icy conditions are common, potentially affecting road access and making walking surfaces slippery. Proper footwear with good grip is essential.

Layering Guide

Dressing in layers is paramount for Perito Moreno Glacier due to its famously unpredictable Patagonian weather. Start with a moisture-wicking synthetic or merino wool base layer. Add an insulating mid-layer like a fleece or a lightweight down jacket. Top this with a waterproof and windproof outer shell (jacket and pants) to protect against fierce winds and sudden precipitation. Always include a warm hat (beanie), gloves (preferably waterproof), a scarf or neck gaiter, and sturdy, waterproof hiking boots with good ankle support. Sunglasses are essential for glare off the ice and UV protection.

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