Weather in Argentina in December

Arguably, Argentina is at its best during December — the very heart of summer. From the bustling urban life of Buenos Aires to the sun-soaked beaches of Mar del Plata, here is our guide to the weather in Argentina in December,  with tips from our local travel experts.

Discover Argentina in December

December marks the peak of summer in Argentina, and the temperatures reflect the sun-drenched days that define this month. It’s a great month to embrace the warmth as you explore vibrant markets, outdoor cafes, and the lively atmosphere of the cities.

With the arrival of December, Argentina is adorned with a festive spirit as the country prepares for the holiday season. Buenos Aires, in particular, comes alive with vibrant street decorations, holiday markets, and a joyful atmosphere. This month is considered the high season of travel — which can mean in some cases an increase in crowds and costs.

Benefits of visiting Argentina in December

There are many benefits to taking a trip to Argentina in December.

You’ll witness the start of summer

Argentina in December is a celebration of summer's splendor, where sunshine, warmth, and festive vibes create an irresistible allure. The landscapes come alive with the warmth of the sun, signaling the beginning of the summer season. 

Whether you're exploring the bustling streets of Buenos Aires or seeking coastal retreats, December in Argentina provides you with the perfect opportunity to kick off your summer with a sense of excitement and adventure.

You’ll be able to take part in the festivities

With the arrival of December, Argentina is adorned with a festive spirit as the country prepares for the holiday season. Buenos Aires, in particular, comes alive with vibrant street decorations, holiday markets, and a joyful atmosphere. 

Experience the cultural richness through open-air performances, traditional festivals, and the lively celebrations that mark the end of the year.

Warm weather that is great for the beach

Take advantage of the warm December weather in Argentina to indulge in refreshing water activities. Whether you're lounging on the golden beaches of Mar del Plata or exploring the crystal-clear waters of the Lake District, the inviting temperatures make it an ideal time for swimming, water sports, and relaxation by the water.

Eager to travel this December? See our guide to the best December destinations.

Downsides of visiting Argentina in December

While December is generally a great time to visit Argentina, as it marks the beginning of summer in the Southern Hemisphere, there are still some downsides to consider:

It is the peak of the high season

December is a peak tourist season in Argentina, especially around the Christmas and New Year holidays. This means more crowds, higher prices for accommodations, and potentially booked-out tours or activities.

There is potential for heatwaves

In some areas, particularly in the central and northern parts of the country, December can bring occasional heatwaves. This may impact your outdoor activities and make certain destinations less enjoyable.

Beaches could get busy

Coastal areas, especially popular beach destinations like Mar del Plata, can be crowded as locals and tourists flock to the beaches to escape the summer heat.

Not sure when to travel? Arm yourself with info on when to go to Argentina around the year.

Weather in Argentina in December

December in Argentina marks the beginning of summer, bringing warmer temperatures and a lively atmosphere.

Temperatures and humidity

Here is the weather in Argentina in December, categorized by geographical region:

North Argentina

In December, northern Argentina experiences the onset of summer with warm temperatures. The climate becomes hot and temperatures soar, ranging from 25°C to 35°C (77°F to 95°F. 

Humidity levels can be high, ranging from 50% to 70%, leading to warm and potentially muggy conditions. If you’re planning a trip, you should be prepared for the heat but can also enjoy the vibrant energy and lively atmosphere characteristic of this season.

Central Argentina

Central Argentina enters the summer season in December, with temperatures becoming noticeably warmer —  between 20°C to 30°C (68°F to 86°F). 

The climate is generally hot, and residents and visitors can embrace the lively spirit of summer. Humidity levels are moderate, ranging from 40% to 60%

Southern Argentina

Southern regions like Bariloche and Neuquén witness milder temperatures in December, ranging from 15°C to 25°C (59°F to 77°F). Humidity levels are generally lower, ranging from 30% to 50%, providing a more comfortable summer climate.

Temperatures around Buenos Aires

December in Buenos Aires marks the height of spring turning into summer, with warm to hot daytime temperatures around 25°C to 35°C (77°F to 95°F). The city becomes vibrant with outdoor events and cultural activities. 

However, the downside includes the potential for higher humidity ranging from 60% to 80%, making the weather feel warmer than the actual temperature.

Traveling to Buenos Aires? Don't miss the opportunity to choose the best places to stay in the city.

Temperatures in Patagonia

In December, Patagonia experiences milder temperatures ranging from 10°C to 20°C (50°F to 68°F) as the region transitions into summer. While not as hot as some northern areas, the climate becomes pleasant, and the landscapes flourish with the onset of the warmer season. 

Humidity levels are relatively low, ranging from 20% to 40%, which can mean a refreshing summer climate amidst its stunning landscapes for your December trip.

What about crowds and costs in Argentina in December?

December in Argentina is the beginning of summer, attracting a surge in tourists eager to experience the festive season. Popular destinations, beaches, and cultural sites often become bustling with activity, leading to higher accommodation and travel costs.

Although the weather in Argentina in December is wonderful, you’ll want to be prepared for the peak-season prices.

Looking for more options for your winter holiday? Explore our list of the best destinations to visit in December.

Best places to see in December

Here’s our selection of the finest places to include in your travel plans to take advantage of the weather in Argentina in December:

Bariloche and the Lake District

Located in the Andes, Bariloche is surrounded by stunning lakes and mountains. It's a popular destination for outdoor activities such as hiking, fishing, and water sports. The scenery is breathtaking, and the chocolate in Bariloche is famous.

Iguazu Falls

A UNESCO World Heritage site, Iguazu Falls is one of the most impressive waterfall systems in the world. The subtropical climate makes it an excellent destination for nature lovers. Explore the national parks and take boat trips to get up close to the falls.

Mendoza

Famous for its vineyards and wineries, Mendoza is a great destination for wine enthusiasts. Or, if wine isn’t your cup of tea, you can also enjoy outdoor activities such as hiking and rafting in the nearby Andes.

Tucumán

This city is the gateway to the Argentine Northwest and is known for its historical significance. Explore the colonial architecture, visit the Independence House, and use Tucumán as a base to explore nearby natural attractions.

Considering visiting Argentina in December? Dive into our Argentina itineraries to start planning your perfect trip.

Best things to do in December

December is a great time to explore Argentina, and here’s our pick of the best things to do during your trip. For more inspiration, see our guide to the best things to do in Argentina.

Visit Bariloche's Christmas Market

Embrace the festive spirit in December by visiting Bariloche's Christmas Market. Nestled in the picturesque setting of the Argentine Andes, Bariloche transforms into a winter wonderland during the holiday season. 

The Christmas market, adorned with twinkling lights and holiday decorations, offers a delightful atmosphere. Here you can browse through stalls selling local crafts, artisanal goods, and seasonal treats.

Experience New Year's Eve in Buenos Aires

Celebrate the arrival of the new year in style by experiencing New Year's Eve in the vibrant metropolis of Buenos Aires. The city comes alive with lively street parties, spectacular fireworks displays, and a festive atmosphere. Join the locals in counting down to midnight at iconic locations like Puerto Madero or Plaza de Mayo. 

Explore the Quebrada de Humahuaca

December invites you to explore the cultural and natural wonders of the Quebrada de Humahuaca. This UNESCO World Heritage Site in the Andean Northwest boasts stunning landscapes, charming villages, and a rich indigenous heritage. Discover historic towns like Purmamarca and Tilcara, with their vibrant markets and ancient ruins. 

Enjoy water sports in Mar del Plata

You may want to escape the summer heat in December by enjoying water sports in the coastal paradise of Mar del Plata. Known for its expansive beaches and vibrant seafront, Mar del Plata offers a plethora of activities, from surfing and kayaking to sailing and beach volleyball. 

Join the locals and fellow travelers in the exhilarating water sports scene, or simply relax on the sandy shores and soak up the sun.

Visit Salta's Cathedral Basilica

Take the opportunity to experience the rich cultural and religious heritage of Salta by visiting the Cathedral Basilica in December. This historic cathedral, located in the heart of Salta City, showcases colonial architecture and intricate artwork. As the city prepares for Christmas festivities, the cathedral becomes a focal point for religious celebrations and cultural events. 

Planning your trip to Argentina

Ready to experience Argentina? With our tailor-made trip service, you can skip the hours of research required for your dream vacation. Trust us with the planning and booking. Our journeys are meticulously designed by local travel experts and can be entirely adapted to your preferences. 

• From Chile to Argentina (13 days): Explore the Andean Lakes from Santiago to Buenos Aires, passing through Puerto Varas and Bariloche, and marvel at stunning mountain landscapes.
• The Great Lakes and Glaciers of Argentina (10 days): Experience Argentina's stunning outdoors, from Patagonian landscapes to Bariloche's lakes and the awe-inspiring Perito Moreno Glacier.
• An adventure across three countries: Brazil, Argentina & Uruguay (14 days): Discover the history, culture, and nature in Brazil, Argentina, and Uruguay on a 14-day trip. Visit iconic sites like Sugar Loaf Mountain, Iguazu Falls, and UNESCO-listed Colonia del Sacramento.

Or browse our other Argentina itineraries for more inspiration.

Events and festivals in December

Here are some of the events and festivals you can experience in Argentina in December:

Fiesta Nacional del Golfo Azul

San Antonio Oeste, Rio Negro, hosts the Fiesta Nacional del Golfo Azul in December, a festival celebrating the beauty of the Blue Gulf, featuring maritime events, cultural displays, and festivities that highlight the coastal heritage of the region.

Fiesta Nacional de la Orquídea

Montecarlo, Misiones, blooms with the Fiesta Nacional de la Orquídea in December, a festival dedicated to orchids, showcasing floral exhibitions, cultural events, and activities that celebrate the natural beauty of these exquisite flowers.

Fiesta Nacional del Durazno

Trenque Lauquen, Buenos Aires, celebrates the Fiesta Nacional del Durazno in December, a festival dedicated to peaches and agriculture, featuring tastings, agricultural displays, and cultural activities that honor the region's peach-growing heritage.

Fiesta Nacional de la Frutilla

Coronda, Santa Fe, hosts the Fiesta Nacional de la Frutilla in December, a festival dedicated to strawberries, offering tastings, agricultural exhibitions, and cultural displays that celebrate the sweetness of this delicious fruit and the agricultural traditions of the region.