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December Weather in San Carlos, Uruguay

Last updated: August 28, 2025

In San Carlos, Uruguay, the average temperature in December hovers around 21°C (69°F). Expect a minimum of 8°C (47°F) and a maximum of 34°C (93°F), making for pleasantly warm days. Precipitation during this time averages 60 mm (2.4 in) across 7 days, with an average humidity level of 65%, creating a vibrant and lush atmosphere.

December Temperature in San Carlos

In December in San Carlos, the average temperature is 21°C (69°F), with maximums reaching 34°C (93°F) and minimums dipping as low as 8°C (47°F). Overall, visitors can expect a warm climate with some variability, making it ideal for exploring diverse outdoor activities.

December Weather in San Carlos: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in San Carlos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Carlos, December typically has an average temperature of 21°C (69°F), with highs reaching up to 34°C (93°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec737269655854525456606569
Data source: Temperature data for San Carlos 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 San Carlos

In San Carlos in December, the precipitation amount is 60 mm (2.4 in) over the course of 7 days.

December Precipitation Trends in San Carlos

The chart displays monthly precipitation patterns in San Carlos, 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 San Carlos, December typically receives around 60 mm (2.4 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec771006689781201059785946260
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in San Carlos

In San Carlos in December humidity is 65%. With an average temperature of 21°C (69°F), this humidity feels like a balmy embrace, making outdoor excursions refreshing yet slightly sticky, so travelers should stay hydrated and take breaks in shaded areas to fully enjoy their adventures.

December Average Humidity in San Carlos

This chart illustrates the average monthly humidity levels in San Carlos, 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 San Carlos is approximately 65%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec63%69%73%79%83%80%72%72%76%71%68%65%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in San Carlos

In San Carlos 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 San Carlos, you can check here.

Maximum UV Index Levels in San Carlos for December

The chart shows the monthly maximum UV Index (UVI) for San Carlos 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 San Carlos typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141311753468111314
Data source: San Carlos 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 San Carlos Compares to Other Months

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

This table compares monthly weather conditions in San Carlos, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather23°C (73°F)77 mm (3.0 inches)63%extreme
February Weather22°C (72°F)100 mm (3.9 inches)69%extreme
March Weather20°C (69°F)66 mm (2.6 inches)73%extreme
April Weather18°C (65°F)89 mm (3.5 inches)79%high
May Weather15°C (59°F)78 mm (3.1 inches)82%moderate
June Weather12°C (54°F)120 mm (4.7 inches)80%moderate
July Weather11°C (52°F)105 mm (4.2 inches)72%moderate
August Weather12°C (54°F)97 mm (3.8 inches)72%high
September Weather13°C (57°F)85 mm (3.3 inches)76%very high
October Weather15°C (60°F)94 mm (3.7 inches)71%extreme
November Weather18°C (65°F)62 mm (2.4 inches)68%extreme
December Weather21°C (69°F)60 mm (2.4 inches)65%extreme

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