December Weather in Rio Segundo, Costa Rica

Last updated: August 23, 2025

In December, the average temperature in Rio Segundo, Costa Rica is a pleasant 19°C (67°F), with a minimum of 14°C (57°F) and a maximum of 25°C (77°F). Expect moderate rainfall, with an average precipitation of 192 mm (7.6 in) spread over 19 days. The air is fairly humid, with an average humidity of 74%. Enjoy the vibrant weather while exploring this beautiful destination!

December Temperature in Rio Segundo

In December in Rio Segundo, the average temperature is 19°C (67°F). The maximum can reach 25°C (77°F), while the minimum can drop to as low as 14°C (57°F). This mild climate makes it an ideal destination for travelers seeking comfortable weather for outdoor activities.

December Weather in Rio Segundo: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Rio Segundo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio Segundo, December typically has an average temperature of 19°C (67°F), with highs reaching up to 25°C (77°F) and lows dropping to around 14°C (57°F).

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

December Precipitation in Rio Segundo

In Rio Segundo in December, the precipitation amount is 192 mm (7.6 in) spread over 19 days, indicating a relatively wet period for the region.

December Precipitation Trends in Rio Segundo

The chart displays monthly precipitation patterns in Rio Segundo, 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 Rio Segundo, December typically receives around 192 mm (7.6 inches) of precipitation spread over approximately 19 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 Rio Segundo

In Rio Segundo in December, humidity is 74%. With an average temperature of 19°C (67°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities feel stifling, often leading travelers to seek shade and hydrate frequently.

December Average Humidity in Rio Segundo

This chart illustrates the average monthly humidity levels in Rio Segundo, 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 Rio Segundo is approximately 74%, 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 Rio Segundo

In Rio Segundo 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 Rio Segundo.

Maximum UV Index Levels in Rio Segundo for December

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

Data source: Rio Segundo 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 Rio Segundo Compares to Other Months

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

This table compares monthly weather conditions in Rio Segundo, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	19°C (66°F)	109 mm (4.3 inches)	71%	extreme
February Weather	19°C (66°F)	48 mm (1.9 inches)	70%	extreme
March Weather	19°C (67°F)	57 mm (2.2 inches)	68%	extreme
April Weather	21°C (69°F)	113 mm (4.5 inches)	69%	extreme
May Weather	21°C (70°F)	310 mm (12.2 inches)	70%	extreme
June Weather	21°C (70°F)	275 mm (10.8 inches)	81%	extreme
July Weather	21°C (69°F)	275 mm (10.8 inches)	88%	extreme
August Weather	21°C (70°F)	273 mm (10.7 inches)	85%	extreme
September Weather	21°C (70°F)	287 mm (11.3 inches)	84%	extreme
October Weather	21°C (69°F)	402 mm (15.8 inches)	82%	extreme
November Weather	20°C (68°F)	272 mm (10.7 inches)	81%	extreme
December Weather	19°C (67°F)	192 mm (7.6 inches)	74%	very high