December weather forecast
Rio San Juan, Dominican Republic

Closing the year, December in Rio San Juan bids farewell to the damp and warmly welcomes the cool sea breeze. Even with reduced sunshine hours, the weather stays warm due to the temperate sea current. December experiences high rainfall, measuring at 225mm (8.86"), marking the end of the wet season. The merry weather combined with the holiday season imbues a festive atmosphere, making December in Rio San Juan indeed a time to remember.

Temperature

The months of January, February and December bring the lowest temperatures in Rio San Juan, averaging a high of 28°C (82.4°F).

Rainfall

In December, in Rio San Juan, Dominican Republic, the rain falls for 14 days. Throughout December, 225mm (8.86") of precipitation is accumulated. Throughout the year, there are 162 rainfall days, and 1895mm (74.61") of precipitation is accumulated.

Sea temperature

In Rio San Juan, in December, the average water temperature is 27.3°C (81.1°F).
Note: For water activities like swimming, diving, and more, temperatures ranging between 25°C (77°F) and 29°C (84.2°F) offer superior comfort and enjoyment for lengthy durations.

Daylight

December has the shortest days of the year in Rio San Juan, with an average of 11h and 0min of daylight.
On the first day of the month, sunrise is at 06:58 and sunset at 18:00. On the last day of December, sunrise is at 07:14 and sunset at 18:12 AST.

Sunshine

November and December, with an average of 6h of sunshine, are months with the least sunshine in Rio San Juan.

UV index

December is the month with the lowest UV index, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the average person.
Note: During December, 7 as the daily maximum UV index converts into the following advice:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. Always opt for UVA and UVB-resistant sunglasses on radiant days. Heed this! UV intensity is much stronger when reflected off sand and water.