December Weather in Upala, Costa Rica

Last updated: August 23, 2025

In December, the average temperature in Upala, Costa Rica hovers around 25°C (76°F), with a comfortable range of 21°C (70°F) to 28°C (84°F). Visitors should prepare for ample precipitation, totaling 276 mm (10.9 in) over 29 days, contributing to an average humidity of 70%. Embrace the lively atmosphere of this season while staying equipped for the occasional shower!

December Temperature in Upala

In December in Upala, the average temperature is 25°C (76°F). Maximums can reach 28°C (84°F), and minimums can be as low as 21°C (70°F). This pleasant weather makes it an ideal time for outdoor adventures and exploring the local attractions.

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

The chart illustrates December temperature patterns in Upala, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Upala, December typically has an average temperature of 25°C (76°F), with highs reaching up to 28°C (84°F) and lows dropping to around 21°C (70°F).

Data source: Temperature data for Upala generated using information from the Copernicus Climate Change Service.

December Precipitation in Upala

In Upala in December, the precipitation amount is 276 mm (10.9 in) spread over a period of 29 days.

December Precipitation Trends in Upala

The chart displays monthly precipitation patterns in Upala, 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 Upala, December typically receives around 276 mm (10.9 inches) of precipitation spread over approximately 29 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

December Humidity in Upala

In Upala in December humidity is 70%. With an average temperature of 25°C (76°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities a bit sticky but still enjoyable for exploring local attractions and savoring the vibrant culture.

December Average Humidity in Upala

This chart illustrates the average monthly humidity levels in Upala, 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 Upala is approximately 70%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Upala

In Upala 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 Upala.

Maximum UV Index Levels in Upala for December

The chart shows the monthly maximum UV Index (UVI) for Upala 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 Upala typically reaches 10, which falls under the very high exposure category.

Data source: Upala 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 Upala Compares to Other Months

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

This table compares monthly weather conditions in Upala, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	24°C (76°F)	191 mm (7.5 inches)	66%	extreme
February Weather	25°C (76°F)	117 mm (4.6 inches)	64%	extreme
March Weather	25°C (77°F)	132 mm (5.2 inches)	63%	extreme
April Weather	26°C (79°F)	85 mm (3.4 inches)	63%	extreme
May Weather	26°C (79°F)	277 mm (10.9 inches)	63%	extreme
June Weather	26°C (79°F)	326 mm (12.8 inches)	74%	extreme
July Weather	25°C (78°F)	331 mm (13.0 inches)	85%	extreme
August Weather	26°C (78°F)	301 mm (11.8 inches)	82%	extreme
September Weather	26°C (79°F)	263 mm (10.4 inches)	80%	extreme
October Weather	26°C (78°F)	356 mm (14.0 inches)	79%	extreme
November Weather	25°C (78°F)	339 mm (13.3 inches)	79%	extreme
December Weather	25°C (76°F)	276 mm (10.9 inches)	70%	very high