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December Weather in Tres Arroyos, Argentina

Last updated: August 22, 2025

In Tres Arroyos, Argentina, the average temperature for December hovers around 20°C (69°F). However, temperatures can vary significantly, with a minimum as low as 4°C (40°F) and a maximum reaching up to 36°C (97°F). Expect about 89 mm (3.5 in) of precipitation spread over 9 days, and enjoy an average humidity of 58% throughout the month.

December Temperature in Tres Arroyos

In December in Tres Arroyos, the average temperature is 20°C (69°F). Maximums can reach 36°C (97°F) while minimums can drop to as low as 4°C (40°F). This variety in temperatures makes it essential for travelers to pack both light clothing for the warmer days and layers for cooler evenings.

December Weather in Tres Arroyos: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Tres Arroyos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tres Arroyos, December typically has an average temperature of 20°C (69°F), with highs reaching up to 36°C (97°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec726965605247454952566368
Data source: Temperature data for Tres Arroyos generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Tres Arroyos

In Tres Arroyos in December, the precipitation amount is 89 mm (3.5 in) during a span of 9 days.

December Precipitation Trends in Tres Arroyos

The chart displays monthly precipitation patterns in Tres Arroyos, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Tres Arroyos, December typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec708265824644433352688589
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Tres Arroyos

In Tres Arroyos in December humidity is 58%. With an average temperature of 20°C (69°F), this humidity feels like a refreshing balmy embrace, making it quite pleasant for traveling as long as you stay hydrated and take occasional breaks in the shade.

December Average Humidity in Tres Arroyos

This chart illustrates the average monthly humidity levels in Tres Arroyos, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Tres Arroyos is approximately 58%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec61%67%70%75%77%74%71%68%71%68%65%58%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Tres Arroyos

In Tres Arroyos in December, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Tres Arroyos, you can check here.

Maximum UV Index Levels in Tres Arroyos for December

The chart shows the monthly maximum UV Index (UVI) for Tres Arroyos in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Tres Arroyos typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141210743357101214
Data source: Tres Arroyos December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Tres Arroyos Compares to Other Months

Weather in Tres Arroyos varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Tres Arroyos, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Tres Arroyos, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather22°C (72°F)70 mm (2.8 inches)61%extreme
February Weather21°C (69°F)82 mm (3.2 inches)67%extreme
March Weather19°C (66°F)65 mm (2.6 inches)70%very high
April Weather15°C (60°F)82 mm (3.2 inches)75%high
May Weather11°C (52°F)46 mm (1.8 inches)77%moderate
June Weather9°C (48°F)44 mm (1.7 inches)74%moderate
July Weather7°C (46°F)43 mm (1.7 inches)71%moderate
August Weather9°C (49°F)33 mm (1.3 inches)68%moderate
September Weather11°C (52°F)52 mm (2.1 inches)71%high
October Weather14°C (57°F)67 mm (2.7 inches)68%very high
November Weather17°C (63°F)85 mm (3.4 inches)65%extreme
December Weather20°C (69°F)89 mm (3.5 inches)58%extreme

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