Rio Negro (San Carlos de Bariloche)
December
Weather in Rio Negro for December 2026
Your guide to Rio Negro weather in December - trends and predictions
In general, the average temperature in Rio Negro at the beginning of December is 18.4 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 20.1 °C by the end of December.
With an average of 3 rainy days, Rio Negro experiences minimal rainfall in December.
Temperatures
Rain 🌧️
28
Dry days
3
Rainy days
0
Snow days
17°/3°
Temperatures
28 km/h
Avg max wind
57 %
Avg humidity
Rio Negro Weather December
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Temperatures trend during December in Rio Negro
See the weather trend as well as the moving average line
December weather in Rio Negro day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. |  Patchy rain possible | 15° /3° | 0 mm | 11 | |
| 2 Dec. | Patchy rain possible | 11° /4° | 0 mm | 11 | |
| 3 Dec. |  Mist | 19° /4° | 0 mm | 12 | |
| 4 Dec. |  Partly cloudy | 18° /5° | 0 mm | 11 | |
| 5 Dec. |  Overcast | 18° /3° | 0 mm | 11 | |
| 6 Dec. |  Sunny | 23° /2° | 0 mm | 11 | |
| 7 Dec. | Sunny | 25° /7° | 0 mm | 11 | |
| 8 Dec. | Patchy rain possible | 25° /12° | 1.6 mm | 12 | |
| 9 Dec. | Sunny | 22° /9° | 1.3 mm | 12 | |
| 10 Dec. | Sunny | 20° /8° | 0 mm | 12 | |
| 11 Dec. | Sunny | 17° /3° | 0.2 mm | 12 | |
| 12 Dec. | Patchy rain possible | 12° /1° | 0.2 mm | 10 | |
| 13 Dec. | Patchy rain possible | 10° /0° | 0.4 mm | 9 | |
| 14 Dec. |  Light freezing rain | 7° /0° | 0.6 mm | 6 | |
| 15 Dec. | Patchy rain possible | 9° /1° | 0.5 mm | 5 | |
| 16 Dec. | Sunny | 21° /1° | 0 mm | 12 | |
| 17 Dec. | Mist | 15° /2° | 0 mm | 12 | |
| 18 Dec. | Sunny | 18° /2° | 0 mm | 12 | |
| 19 Dec. | Sunny | 17° /3° | 0 mm | 12 | |
| 20 Dec. |  Light rain | 11° /4° | 3.8 mm | 5 | |
| 21 Dec. | Partly cloudy | 14° /1° | 0 mm | 12 | |
| 22 Dec. | Patchy rain possible | 14° /1° | 0.3 mm | 12 | |
| 23 Dec. | Sunny | 13° /2° | 0 mm | 12 | |
| 24 Dec. | Sunny | 14° /0° | 0 mm | 11 | |
| 25 Dec. | Overcast | 18° /2° | 0 mm | 12 | |
| 26 Dec. | Patchy rain possible | 12° /5° | 0 mm | 12 | |
| 27 Dec. | Partly cloudy | 21° /1° | 0 mm | 11 | |
| 28 Dec. | Sunny | 22° /2° | 0 mm | 11 | |
| 29 Dec. | Sunny | 21° /4° | 0 mm | 11 | |
| 30 Dec. | Sunny | 21° /6° | 0 mm | 11 | |
| 31 Dec. | Sunny | 26° /6° | 0 mm | 11 | |
| Next | |||||
Important Notice
Our weather forecast for Rio Negro in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Rio Negro forecast closer to your planned date for the most up-to-date weather information.
Change Month
Rio Negro in December - FAQ
What are the expected maximum and minimum temperatures in Rio Negro during December?
During December, expect a variety of temperatures with highs around 17° and lows near 3°, suitable for diverse activities and preferences.
How much rainfall should be expected in Rio Negro during December?
Rainfall in Rio Negro during December is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 3 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Rio Negro during December?
The average wind speed in Rio Negro during December is 28 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in Rio Negro
Explore the daily rainfall trends and prepare for Rio Negros December weather 💧
Typically, Rio Negro has 3 rainy days in December with a total of 8.9 mm of rainfall.
UV exposure in Rio Negro during December
Stay informed about UV levels for safe outdoor activities throughout the month of December ☀️
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