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December Weather in Treinta y Tres, Uruguay

Last updated: August 28, 2025

In Treinta y Tres, Uruguay, the average temperature in December hovers around 22°C (72°F), creating a comfortable environment for outdoor activities. However, temperatures can vary significantly, with a minimum of 8°C (47°F) and a maximum reaching up to 35°C (96°F). Expect about 58 mm (2.3 in) of precipitation spread over 6 days, contributing to an average humidity of 77%. It's a month that invites both adventure and relaxation!

December Temperature in Treinta y Tres

In December in Treinta y Tres, the average temperature is 22°C (72°F), with maximums reaching up to 35°C (96°F) and minimums dropping as low as 8°C (47°F). This variety in temperatures makes it a perfect time for travelers to enjoy both warm days and cooler evenings.

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

The chart illustrates December temperature patterns in Treinta y Tres, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Treinta y Tres, December typically has an average temperature of 22°C (72°F), with highs reaching up to 35°C (96°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec757370665855535559626871
Data source: Temperature data for Treinta y Tres 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 Treinta y Tres

In Treinta y Tres in December, the precipitation amount is 58 mm (2.3 in) over the course of 6 days.

December Precipitation Trends in Treinta y Tres

The chart displays monthly precipitation patterns in Treinta y Tres, 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 Treinta y Tres, December typically receives around 58 mm (2.3 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec102108597977118831031231247058
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Treinta y Tres

In Treinta y Tres in December humidity is 77%. With average temperature 22°C (72°F), this humidity feels like walking through a warm, damp embrace, making outdoor activities both refreshing and slightly uncomfortable for travelers unaccustomed to such conditions.

December Average Humidity in Treinta y Tres

This chart illustrates the average monthly humidity levels in Treinta y Tres, 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 Treinta y Tres is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec71%74%76%82%87%86%81%78%82%82%79%77%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Treinta y Tres

In Treinta y Tres 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 Treinta y Tres, you can check here.

Maximum UV Index Levels in Treinta y Tres for December

The chart shows the monthly maximum UV Index (UVI) for Treinta y Tres 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 Treinta y Tres typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec151312854468111314
Data source: Treinta y Tres 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 Treinta y Tres Compares to Other Months

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

This table compares monthly weather conditions in Treinta y Tres, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (75°F)102 mm (4.0 inches)71%extreme
February Weather23°C (73°F)108 mm (4.3 inches)74%extreme
March Weather21°C (70°F)59 mm (2.3 inches)76%extreme
April Weather19°C (66°F)79 mm (3.1 inches)81%very high
May Weather15°C (59°F)77 mm (3.0 inches)87%moderate
June Weather13°C (55°F)118 mm (4.6 inches)86%moderate
July Weather12°C (53°F)83 mm (3.3 inches)81%moderate
August Weather13°C (55°F)103 mm (4.1 inches)78%high
September Weather15°C (59°F)123 mm (4.8 inches)82%very high
October Weather17°C (62°F)124 mm (4.9 inches)82%extreme
November Weather20°C (68°F)69 mm (2.7 inches)79%extreme
December Weather22°C (72°F)58 mm (2.3 inches)77%extreme

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