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December in Termas de Reyes averages 19°C (66°F) during the day and 9°C (48°F) at night. December is part of the rainy season, with around 382 mm (15 in) of rainfall and frequent showers.
December in Termas de Reyes can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
Pick a month to see the average temperature, rainfall and sunshine in Termas de Reyes - and find the best time to visit.
50-year average (1976-2025)
Based on our historical records, temperatures in Termas de Reyes typically stay consistent throughout December, with daily highs averaging around 19°C (66°F). Nights are pleasant, with lows typically ranging from 16°C (61°F) to 19°C (66°F).
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Browse day-by-day weather records for Termas de Reyes spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
The extremes listed below come from historical weather data collected in Termas de Reyes from 1976 through 2025.
Find out more about the weather in Argentina and which places have the best travel conditions in this month. See all of Argentina in December →
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).
Pleasant temperatures in December mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Temperature Rainfall Sunshine Humidity
See the full Termas de Reyes climate overview or explore weather in Argentina.
Where to go in December - average daytime high across popular destinations.
Need travel inspiration? Check out our bucket list articles and be inspired.
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