Río Negro Weather in December

Average temperatures, rainfall, sunshine and the best places to visit in Río Negro, Argentina in December.

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El Bolsón Las Grutas Cipolletti Viedma

Thinking about venturing to Río Negro, Argentina this December and curious about the weather conditions to expect? This page holds all the key information you seek, responding to your question:

What to Expect in Río Negro in December

Río Negro, Argentina is a region in Argentina. Río Negro, Argentina offers a broad spectrum of weather patterns. In December, one might encounter temperatures that range from mild to very warm, and precipitation levels ranging from low to moderate. During December, summer is in full swing.

Temperatures

During the day temperatures vary from mild in Villa Mascardi at 16°C (61°F) to very warm in Allen at 31°C (88°F). At night it cools down to 15°C (59°F) in Allen and 4°C (39°F) in Villa Mascardi.

To learn more about the conditions in specific areas of Río Negro, Argentina, check out the map below.

Precipitation

In December, precipitation varies across different areas. From low rainfall in Allen with an average of 15 mm (0.6 in) to moderate rainfall in El Bolsón with 94 mm (3.7 in).

Explore Río Negro by month

Pick a month to see the average temperature, rainfall and sunshine in Río Negro — and find the best time to visit. (based on El Bolsón)

January20°C (68°F) February21°C (70°F) March18°C (64°F) April13°C (55°F) May9°C (48°F) June5°C (41°F) This monthJuly5°C (41°F) August6°C (43°F) September9°C (48°F) October12°C (54°F) November15°C (59°F) December18°C (64°F)
Best Time to Visit Río Negro →

Best Places to Visit in Río Negro in December

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Río Negro.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Río Negro

What is the weather like in December for some of the most popular destinations in Río Negro, Argentina?

Temperature range in Río Negro (December)

Precipitation variation in Río Negro (December)

El Bolsón

In December El Bolsón generally has moderate temperatures with maximum daytime temperatures around 18°C (64°F), minimum nighttime temperatures around 5°C (41°F) and moderate monthly rainfall. So on average the conditions are pleasant that month.

« November
December
January »
November
December
January
Max temperature
15°C (59°F)
18°C (64°F)
20°C (68°F)
Min temperature
3°C (37°F)
5°C (41°F)
7°C (45°F)
Monthly rainfall
102 mm (4 in)
94 mm (3.7 in)
64 mm (2.5 in)
Monthly rainy days
5 days
5 days
4 days
Weather conditions
unpleasant
pleasant
perfect
Climate in El Bolsón →

Las Grutas

In December Las Grutas generally has high temperatures with maximum daytime temperatures around 28°C (82°F), minimum nighttime temperatures around 16°C (61°F) and low monthly rainfall. So on average the conditions are perfect that month.

« November
December
January »
November
December
January
Max temperature
25°C (77°F)
28°C (82°F)
30°C (86°F)
Min temperature
13°C (55°F)
16°C (61°F)
18°C (64°F)
Monthly rainfall
25 mm (1 in)
17 mm (0.7 in)
21 mm (0.8 in)
Monthly rainy days
4 days
4 days
3 days
Weather conditions
perfect
perfect
perfect
Climate in Las Grutas →

Cipolletti

In December Cipolletti generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 15°C (59°F) and low monthly rainfall. So on average the conditions are perfect that month.

« November
December
January »
November
December
January
Max temperature
28°C (82°F)
31°C (88°F)
33°C (91°F)
Min temperature
12°C (54°F)
15°C (59°F)
17°C (63°F)
Monthly sun hours
282 hours
279 hours
315 hours
Monthly rainfall
21 mm (0.8 in)
15 mm (0.6 in)
14 mm (0.6 in)
Monthly rainy days
3 days
3 days
3 days
Weather conditions
perfect
perfect
perfect
Climate in Cipolletti →

Viedma

In December Viedma generally has high temperatures with maximum daytime temperatures around 24°C (75°F), minimum nighttime temperatures around 15°C (59°F) and low monthly rainfall. So on average the conditions are perfect that month.

« November
December
January »
November
December
January
Max temperature
21°C (70°F)
24°C (75°F)
25°C (77°F)
Min temperature
13°C (55°F)
15°C (59°F)
17°C (63°F)
Monthly sun hours
271 hours
295 hours
290 hours
Monthly rainfall
29 mm (1.1 in)
24 mm (0.9 in)
29 mm (1.1 in)
Monthly rainy days
6 days
6 days
5 days
Weather conditions
perfect
perfect
perfect
Climate in Viedma →

Allen

In December Allen generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 15°C (59°F) and low monthly rainfall. So on average the conditions are perfect that month.

« November
December
January »
November
December
January
Max temperature
28°C (82°F)
31°C (88°F)
33°C (91°F)
Min temperature
13°C (55°F)
15°C (59°F)
17°C (63°F)
Monthly sun hours
282 hours
279 hours
315 hours
Monthly rainfall
21 mm (0.8 in)
15 mm (0.6 in)
14 mm (0.6 in)
Monthly rainy days
3 days
3 days
2 days
Weather conditions
perfect
perfect
perfect
Climate in Allen →

Is your destination not in the list? Have a look at all destinations in Río Negro, in Argentina.

In our records: Argentina December extremes

Notable December records observed across cities in Argentina in our climate database (1976 – 2026). Historic readings can vary in quality, so treat these as illustrative.

  • In our records, the warmest December day in Argentina reached 48°C (118°F) in Santiago del Estero on December 19, 1995.

Popular cities in December

Day & night temperatures, rainfall and average weather in Río Negro in December.

City Weather Day temp Night temp Rainfall
El Bolsón 18°C (64°F) 5°C (41°F) 94 mm (3.7 in)
Las Grutas 28°C (82°F) 16°C (61°F) 17 mm (0.7 in)
Cipolletti 31°C (88°F) 15°C (59°F) 15 mm (0.6 in)
Viedma 24°C (75°F) 15°C (59°F) 24 mm (0.9 in)
Allen 31°C (88°F) 15°C (59°F) 15 mm (0.6 in)
Balneario El Condor 24°C (75°F) 15°C (59°F) 25 mm (1 in)

Río Negro weather in December: frequently asked questions

What is the weather like in Río Negro, Argentina in December?

December in Río Negro, Argentina brings pleasant weather. In El Bolsón, daytime temperatures are typically around 18°C (64°F) and nighttime lows hover near 5°C (41°F).

What is the average temperature in Río Negro, Argentina in December?

Average temperatures in Río Negro, Argentina during December range from a nighttime low near 5°C (41°F) to a daytime high around 18°C (64°F) in El Bolsón.

Does Río Negro, Argentina get a lot of rain in December?

December is on the drier side in Río Negro, Argentina. El Bolsón averages only about 94 mm (3.7 in), with most days staying dry.

Is December a Good Time to Visit Río Negro, Argentina?

Given the typically pleasant weather conditions in El Bolsón, December might be a good time to visit Río Negro, Argentina. However, the weather conditions may vary depending on your destination.

Generally speaking, January and February provide perfect weather in El Bolsón. The weather in April, May, June, July, August, September and October, on the other hand, tends to be poor.

Interested in more climate information?

We have much more information about the climate in Río Negro.

Weather and climate has detailed information for every country in the world. Are you going to Argentina? Get detailed historical weather averages for many cities in Argentina.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.

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