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December Weather in Puerto Rico, Argentina

Last updated: August 22, 2025

In Puerto Rico, Argentina during December, the average temperature hovers around 26°C (78°F). You can expect a comfortable range, with minimums dipping to 12°C (54°F) and soaring up to a sweltering 38°C (100°F). Prepare for some rain as well, with an average precipitation of 112 mm (4.4 in) spread over 10 days. Keep in mind the average humidity is quite high at 84%, adding to the overall tropical feel!

December Temperature in Puerto Rico

In December in Puerto Rico, the average temperature is 26°C (78°F). Maximum temperatures can reach 38°C (100°F), while minimums can drop as low as 12°C (54°F). Pack accordingly for warm days and cooler evenings during your travels!

December Weather in Puerto Rico: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Puerto Rico, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Puerto Rico, December typically has an average temperature of 26°C (78°F), with highs reaching up to 38°C (100°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec797775716562616470727578
Data source: Temperature data for Puerto Rico 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 Puerto Rico

In Puerto Rico in December, the total precipitation amount is 112 mm (4.4 in) over the course of 10 days.

December Precipitation Trends in Puerto Rico

The chart displays monthly precipitation patterns in Puerto Rico, 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 Puerto Rico, December typically receives around 112 mm (4.4 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec170103109961941167654100193145112
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Puerto Rico

In Puerto Rico in December, humidity is 84%. With an average temperature of 26°C (78°F), this humidity feels like walking through a warm, moist blanket, making outdoor activities feel heavy and exhausting for travelers.

December Average Humidity in Puerto Rico

This chart illustrates the average monthly humidity levels in Puerto Rico, 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 Puerto Rico is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec77%71%74%82%82%73%67%49%54%58%69%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Puerto Rico

In Puerto Rico 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 Puerto Rico, you can check here.

Maximum UV Index Levels in Puerto Rico for December

The chart shows the monthly maximum UV Index (UVI) for Puerto Rico 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 Puerto Rico typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec15141310756710131414
Data source: Puerto Rico 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 Puerto Rico Compares to Other Months

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

This table compares monthly weather conditions in Puerto Rico, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (79°F)170 mm (6.7 inches)77%extreme
February Weather25°C (78°F)103 mm (4.0 inches)71%extreme
March Weather24°C (76°F)109 mm (4.3 inches)74%extreme
April Weather22°C (71°F)96 mm (3.8 inches)82%very high
May Weather18°C (65°F)194 mm (7.6 inches)82%high
June Weather17°C (62°F)116 mm (4.5 inches)73%moderate
July Weather16°C (61°F)76 mm (3.0 inches)67%high
August Weather18°C (64°F)54 mm (2.1 inches)49%high
September Weather21°C (71°F)100 mm (3.9 inches)54%very high
October Weather22°C (73°F)192 mm (7.6 inches)58%extreme
November Weather24°C (76°F)145 mm (5.7 inches)69%extreme
December Weather26°C (78°F)112 mm (4.4 inches)84%extreme

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