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December Weather in Riachuelo, Argentina

Last updated: August 22, 2025

In December, the average temperature in Riachuelo, Argentina is a warm 26°C (80°F), with a minimum of 14°C (57°F) and a maximum reaching up to 39°C (103°F). Expect about 76 mm (3.0 in) of precipitation spread over 6 days, and be prepared for a high average humidity of 82%.

December Temperature in Riachuelo

In December in Riachuelo, the average temperature is 26°C (80°F), with maximums reaching 39°C (103°F) and minimums dropping to as low as 14°C (57°F). This range makes it a perfect time for travelers to enjoy outdoor activities while being prepared for warm to mild evenings.

December Weather in Riachuelo: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Riachuelo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Riachuelo, December typically has an average temperature of 26°C (80°F), with highs reaching up to 39°C (103°F) and lows dropping to around 14°C (57°F).
JanFebMarAprMayJunJulAugSepOctNovDec828077726562606368737680
Data source: Temperature data for Riachuelo 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 Riachuelo

In Riachuelo in December, the total precipitation amount reaches 76 mm (3.0 in) over the course of 6 days.

December Precipitation Trends in Riachuelo

The chart displays monthly precipitation patterns in Riachuelo, 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 Riachuelo, December typically receives around 76 mm (3.0 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec139701391221296038398411814776
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Riachuelo

In Riachuelo in December, humidity is 82%. With an average temperature of 26°C (80°F), this humidity feels like a heavy, warm blanket wrapping around you, making outdoor activities feel more exhausting and sweaty, which can be quite challenging for traveling.

December Average Humidity in Riachuelo

This chart illustrates the average monthly humidity levels in Riachuelo, 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 Riachuelo is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%70%73%83%85%73%63%44%50%53%66%82%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Riachuelo

In Riachuelo 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 Riachuelo, you can check here.

Maximum UV Index Levels in Riachuelo for December

The chart shows the monthly maximum UV Index (UVI) for Riachuelo 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 Riachuelo typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec14141210756710131414
Data source: Riachuelo 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 Riachuelo Compares to Other Months

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

This table compares monthly weather conditions in Riachuelo, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather28°C (82°F)139 mm (5.5 inches)76%extreme
February Weather27°C (80°F)70 mm (2.8 inches)70%extreme
March Weather25°C (77°F)139 mm (5.5 inches)73%extreme
April Weather22°C (72°F)122 mm (4.8 inches)83%very high
May Weather18°C (65°F)129 mm (5.1 inches)85%high
June Weather16°C (62°F)60 mm (2.4 inches)73%moderate
July Weather15°C (60°F)38 mm (1.5 inches)63%high
August Weather17°C (64°F)39 mm (1.5 inches)44%high
September Weather20°C (69°F)84 mm (3.3 inches)50%very high
October Weather23°C (73°F)118 mm (4.6 inches)53%extreme
November Weather25°C (77°F)147 mm (5.8 inches)66%extreme
December Weather26°C (80°F)76 mm (3.0 inches)82%extreme

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