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December Weather in Castillos, Uruguay

Last updated: August 28, 2025

In December, the average temperature in Castillos, Uruguay is a pleasant 20°C (69°F). You'll experience minimums dipping to 11°C (51°F) and can expect maximums reaching up to 32°C (90°F). With an average humidity of 76% and 46 mm (1.8 in) of precipitation spread over 7 days, it's a month that balances warmth with a hint of refreshing rain.

December Temperature in Castillos

In December in Castillos, the average temperature is 20°C (69°F). The maximum can reach 32°C (90°F), while the minimum can be as low as 11°C (51°F). It's a pleasant time to visit, offering warm days and cooler evenings, making it perfect for outdoor activities.

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

The chart illustrates December temperature patterns in Castillos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castillos, December typically has an average temperature of 20°C (69°F), with highs reaching up to 32°C (90°F) and lows dropping to around 11°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec737270676056535457616569
Data source: Temperature data for Castillos 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 Castillos

In Castillos in December, the precipitation amount is 46 mm (1.8 in) over the course of 7 days.

December Precipitation Trends in Castillos

The chart displays monthly precipitation patterns in Castillos, 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 Castillos, December typically receives around 46 mm (1.8 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec8697779170143100107951176046
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Castillos

In Castillos in December, humidity is 76%. With an average temperature of 20°C (69°F), this humidity feels like a warm embrace that can make outdoor activities sticky and uncomfortable, requiring frequent breaks and plenty of hydration for a pleasant travel experience.

December Average Humidity in Castillos

This chart illustrates the average monthly humidity levels in Castillos, 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 Castillos is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%79%79%79%80%80%76%78%81%79%78%76%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Castillos

In Castillos 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 Castillos, you can check here.

Maximum UV Index Levels in Castillos for December

The chart shows the monthly maximum UV Index (UVI) for Castillos 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 Castillos typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141311754468111314
Data source: Castillos 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 Castillos Compares to Other Months

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

This table compares monthly weather conditions in Castillos, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather23°C (73°F)86 mm (3.4 inches)75%extreme
February Weather22°C (72°F)97 mm (3.8 inches)79%extreme
March Weather21°C (70°F)77 mm (3.0 inches)79%extreme
April Weather19°C (67°F)91 mm (3.6 inches)79%high
May Weather16°C (61°F)70 mm (2.8 inches)80%moderate
June Weather13°C (56°F)143 mm (5.6 inches)80%moderate
July Weather12°C (54°F)100 mm (3.9 inches)76%moderate
August Weather12°C (54°F)106 mm (4.2 inches)78%high
September Weather14°C (58°F)95 mm (3.7 inches)81%very high
October Weather16°C (61°F)117 mm (4.6 inches)79%extreme
November Weather19°C (66°F)60 mm (2.4 inches)78%extreme
December Weather20°C (69°F)46 mm (1.8 inches)76%extreme

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