La Rioja Province Weather in December

Average temperatures, rainfall, sunshine and the best places to visit in La Rioja Province, Argentina in December.

Planning a trip to La Rioja Province, Argentina this December? Here's what you need to know about the weather:

What to Expect in La Rioja Province in December

La Rioja Province, Argentina is a region in Argentina. December in La Rioja Province generally has temperatures that range from warm to very warm, with precipitation levels ranging from low to heavy. The month of December is in the summer season.

Temperatures

Based on our climate data spanning from 1990-2020, the average maximum temperature is warm in Chilecito at 25°C (77°F) to very warm in Talampaya National Park at 33°C (91°F). Nighttime temperatures generally drop to 20°C (68°F) in Talampaya National Park and 15°C (59°F) in Chilecito. The temperatures mentioned for daytime and nighttime are general averages. However there can be days that surpass these temperatures. So equip yourself with clothing that can handle the potential heat.

For specific regional insights in La Rioja Province, Argentina, refer to the map provided below.

Precipitation

In December, precipitation varies across different areas. From low rainfall in Villa Unión with an average of 28 mm (1.1 in) to heavy rainfall in Chilecito with 339 mm (13 in).

Average sunshine

Plenty of sunshine can be expected in numerous places in December. La Rioja typically receives 270 hours of sunlight, making it ideal for those seeking sunny weather.

Explore La Rioja Province by month

Pick a month to see the average temperature, rainfall and sunshine in La Rioja Province - and find the best time to visit. (based on La Rioja)

Best Places to Visit in La Rioja Province in December

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across La Rioja Province.

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 La Rioja Province

What is the weather like in December for some of the most popular destinations in La Rioja Province, Argentina?

Temperature range in La Rioja Province (December)

Precipitation variation in La Rioja Province (December)

La Rioja

In December La Rioja generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 19°C (66°F) and high monthly rainfall. So on average the conditions are good that month.

November
December
January
Max temperature
29°C (84°F)
31°C (88°F)
31°C (88°F)
Min temperature
17°C (63°F)
19°C (66°F)
20°C (68°F)
Monthly sun hours
268 hours
270 hours
266 hours
Monthly rainfall
91 mm (3.6 in)
122 mm (4.8 in)
145 mm (5.7 in)
Monthly rainy days
5 days
7 days
9 days
Weather conditions

Talampaya National Park

In December Talampaya National Park generally has very high temperatures with maximum daytime temperatures around 33°C (91°F), minimum nighttime temperatures around 20°C (68°F) and moderate monthly rainfall. So on average the conditions are very good that month.

November
December
January
Max temperature
32°C (90°F)
33°C (91°F)
35°C (95°F)
Min temperature
18°C (64°F)
20°C (68°F)
21°C (70°F)
Monthly rainfall
45 mm (1.8 in)
61 mm (2.4 in)
173 mm (6.8 in)
Monthly rainy days
4 days
4 days
7 days
Weather conditions

Chilecito

In December Chilecito generally has high temperatures with maximum daytime temperatures around 25°C (77°F), minimum nighttime temperatures around 15°C (59°F) and heavy monthly rainfall. So on average the conditions are less favorable that month.

November
December
January
Max temperature
23°C (73°F)
25°C (77°F)
25°C (77°F)
Min temperature
13°C (55°F)
15°C (59°F)
15°C (59°F)
Monthly sun hours
268 hours
270 hours
266 hours
Monthly rainfall
366 mm (14 in)
339 mm (13 in)
398 mm (16 in)
Monthly rainy days
3 days
6 days
7 days
Weather conditions

Villa Unión

In December Villa Unión generally has high temperatures with maximum daytime temperatures around 27°C (81°F), minimum nighttime temperatures around 14°C (57°F) and low monthly rainfall. So on average the conditions are excellent that month.

November
December
January
Max temperature
25°C (77°F)
27°C (81°F)
28°C (82°F)
Min temperature
12°C (54°F)
14°C (57°F)
15°C (59°F)
Monthly rainfall
18 mm (0.7 in)
28 mm (1.1 in)
51 mm (2 in)
Monthly rainy days
2 days
4 days
6 days
Weather conditions

Is your destination not in the list? Have a look at all destinations in La Rioja Province, 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 La Rioja Province in December.

City Weather Day temp Night temp Rainfall
La Rioja 31°C (88°F) 19°C (66°F) 122 mm (4.8 in)
Talampaya National Park 33°C (91°F) 20°C (68°F) 61 mm (2.4 in)
Chilecito 25°C (77°F) 15°C (59°F) 339 mm (13 in)
Villa Unión 27°C (81°F) 14°C (57°F) 28 mm (1.1 in)

La Rioja Province weather in December: frequently asked questions

What is the weather like in La Rioja Province, Argentina in December?

Expect mixed weather across La Rioja Province, Argentina in December. The popular destination of La Rioja averages 31°C (88°F) by day and 19°C (66°F) at night during this summer month.

What is the average temperature in La Rioja Province, Argentina in December?

La Rioja averages a daytime maximum of 31°C (88°F) in December, with overnight lows close to 19°C (66°F).

Does La Rioja Province, Argentina get a lot of rain in December?

La Rioja typically receives notable rainfall in December, about 122 mm (4.8 in) on average across La Rioja Province, Argentina.

Is December a Good Time to Visit La Rioja Province, Argentina?

Given the typically good weather conditions in La Rioja, December may not be the ideal time to visit La Rioja Province, Argentina.

Generally speaking, April, May, August, September, October and November provide excellent weather in La Rioja. In contrast, January and December tend to have mixed weather conditions.

Interested in more climate information?

We have much more information about the climate in La Rioja Province.

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.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.