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December Weather in Las Marias, Puerto Rico

Last updated: August 31, 2025

The average temperature in Las Marias, Puerto Rico during December is a pleasant 26°C (79°F). Expect minimums around 23°C (74°F) and highs reaching 29°C (84°F). This month brings a precipitation amount of 19 mm (0.8 in) over approximately 4 days, with an average humidity of 76%. Perfect for enjoying the lush scenery!

December Temperature in Las Marias

In December in Las Marias, the average temperature is 26°C (79°F). The maximum can reach 29°C (84°F), and the minimum can be as low as 23°C (74°F). This mild and pleasant weather makes Las Marias an ideal destination for travelers seeking comfortable conditions.

December Weather in Las Marias: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Las Marias, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Las Marias, December typically has an average temperature of 26°C (79°F), with highs reaching up to 29°C (84°F) and lows dropping to around 23°C (74°F).
JanFebMarAprMayJunJulAugSepOctNovDec777777788081828282818079
Data source: Temperature data for Las Marias 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 Las Marias

In Las Marias in December, the precipitation amount is 19 mm (0.8 in) over a span of 4 days.

December Precipitation Trends in Las Marias

The chart displays monthly precipitation patterns in Las Marias, 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 Las Marias, December typically receives around 19 mm (0.8 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec1721383949486964141716620
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Las Marias

In Las Marias in December humidity is 76%. With an average temperature of 26°C (79°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities challenging and requiring frequent breaks to hydrate and cool down during your travels.

December Average Humidity in Las Marias

This chart illustrates the average monthly humidity levels in Las Marias, 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 Las Marias is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%75%74%75%75%77%80%80%79%78%78%76%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Las Marias

In Las Marias in December, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Las Marias.

Maximum UV Index Levels in Las Marias for December

The chart shows the monthly maximum UV Index (UVI) for Las Marias 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 Las Marias typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911131314131313131298
Data source: Las Marias 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 Las Marias Compares to Other Months

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

This table compares monthly weather conditions in Las Marias, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (78°F)16 mm (0.6 inches)76%very high
February Weather25°C (77°F)21 mm (0.8 inches)75%extreme
March Weather25°C (77°F)38 mm (1.5 inches)74%extreme
April Weather26°C (78°F)39 mm (1.5 inches)75%extreme
May Weather26°C (80°F)49 mm (1.9 inches)75%extreme
June Weather27°C (81°F)48 mm (1.9 inches)77%extreme
July Weather28°C (82°F)69 mm (2.7 inches)80%extreme
August Weather28°C (82°F)64 mm (2.5 inches)80%extreme
September Weather28°C (82°F)141 mm (5.5 inches)79%extreme
October Weather27°C (81°F)71 mm (2.8 inches)78%extreme
November Weather27°C (80°F)66 mm (2.6 inches)78%very high
December Weather26°C (79°F)19 mm (0.8 inches)76%very high

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