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December Weather in Siquirres, Costa Rica

Last updated: August 23, 2025

In Siquirres, Costa Rica, the average temperature in December is a comfortable 21°C (70°F). You'll experience a minimum of 15°C (60°F) and can expect highs of 27°C (80°F). During this month, precipitation averages around 265 mm (10.4 in) spread over 20 days, contributing to a humidity level of 72%.

December Temperature in Siquirres

In December in Siquirres, the average temperature is 21°C (70°F). The maximum can reach 27°C (80°F), and the minimum can be as low as 15°C (60°F). This pleasant weather makes it an ideal time for traveling and exploring the stunning landscapes and attractions the area has to offer.

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

The chart illustrates December temperature patterns in Siquirres, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Siquirres, December typically has an average temperature of 21°C (70°F), with highs reaching up to 27°C (80°F) and lows dropping to around 15°C (60°F).
JanFebMarAprMayJunJulAugSepOctNovDec696969727373727373737270
Data source: Temperature data for Siquirres 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 Siquirres

In Siquirres in December, the total precipitation amount is 265 mm (10.4 in) over the course of 20 days.

December Precipitation Trends in Siquirres

The chart displays monthly precipitation patterns in Siquirres, 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 Siquirres, December typically receives around 265 mm (10.4 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec191114122128458235224189176461349265
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Siquirres

In Siquirres in December, humidity is 72%. With an average temperature of 21°C (70°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities a bit sticky and sweaty, but still manageable for traveling if you stay hydrated and take regular breaks in the shade.

December Average Humidity in Siquirres

This chart illustrates the average monthly humidity levels in Siquirres, 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 Siquirres is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec68%68%66%67%69%84%85%82%81%80%80%73%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Siquirres

In Siquirres in December, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Siquirres.

Maximum UV Index Levels in Siquirres for December

The chart shows the monthly maximum UV Index (UVI) for Siquirres 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 Siquirres typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec121315151414141414141210
Data source: Siquirres 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 Siquirres Compares to Other Months

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

This table compares monthly weather conditions in Siquirres, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather20°C (69°F)191 mm (7.5 inches)68%extreme
February Weather20°C (69°F)114 mm (4.5 inches)68%extreme
March Weather21°C (69°F)122 mm (4.8 inches)66%extreme
April Weather22°C (72°F)128 mm (5.0 inches)67%extreme
May Weather23°C (73°F)458 mm (18.0 inches)69%extreme
June Weather23°C (73°F)235 mm (9.3 inches)84%extreme
July Weather22°C (73°F)224 mm (8.8 inches)85%extreme
August Weather23°C (73°F)189 mm (7.4 inches)82%extreme
September Weather23°C (73°F)176 mm (6.9 inches)81%extreme
October Weather23°C (73°F)461 mm (18.1 inches)80%extreme
November Weather22°C (72°F)349 mm (13.7 inches)80%extreme
December Weather21°C (70°F)265 mm (10.4 inches)72%very high

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