December weather forecast
Tortuguero, Costa Rica

In December, the rainfall in Tortuguero lessens to 619mm (24.37") over 17 days yet rounds off the year as another wet month. However, the reduction in rainfall days allows for an increase in opportunities for outdoor adventures. The consistent sea temperature favors activities like river tours and water sports. It is also a time for holiday-themed events in the local community demonstrating Costa Rica’s cultural celebrations.

Temperature

The lowest level of Tortuguero's temperatures is noted during January, August through December, averaging a high-temperature of 29°C (84.2°F).

Rainfall

In Tortuguero, in December, it is raining for 17 days, with typically 619mm (24.37") of accumulated precipitation. Throughout the year, there are 199 rainfall days, and 4875mm (191.93") of precipitation is accumulated.

Sea temperature

January through April, July, August, November and December, with an average sea temperature of 28°C (82.4°F), are months with the coldest seawater in Tortuguero.
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

With an average of 11h and 30min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 05:36 and sunset at 17:09. On the last day of December, sunrise is at 05:51 and sunset at 17:22 CST.

Sunshine

The months with the most sunshine in Tortuguero are February through June, September and December, with an average of 6h of sunshine.

UV index

With an average maximum UV index of 10, December is the month with the lowest UV index. A UV Index reading of 8 to 10 represents a very high health hazard from exposure to the Sun's UV radiation for the average person.
Note: In December, a regular UV index of 10 translates into these guidelines:
Always be mindful of protection. The risk of damage to skin and eyes is significant if neglected. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Even on a cloudy day, sunscreen with a minimum SPF of 30 should be used liberally and reapplied often, especially after a swim or outdoor activity. Take caution! The UV rays from the Sun gain strength from sand and water reflections.