December weather forecast
Portsmouth, Dominica

In December, Portsmouth braces for a substantial decrease in the number of daylight hours, dropping to an average of 11.2. The city experiences a notable reduction in rainfall when compared to November, receiving roughly 201mm (7.91") of rainfall. This shift in weather phenomena sets the stage for the sun-drenched, drier season commencing in the new year. December marks the descent to the shortest day of the year. Meanwhile, the UV index dips to 8, its annual low.

Temperature

The introduction of December notes a subtle temperature variation to a moderately hot 29°C (84.2°F) from November's 30°C (86°F). Portsmouth experiences an average low-temperature of 22°C (71.6°F) in month of December.

Rainfall

In Portsmouth, in December, during 18 rainfall days, 201mm (7.91") of precipitation is typically accumulated. In Portsmouth, during the entire year, the rain falls for 214 days and collects up to 2252mm (88.66") of precipitation.

Sea temperature

In Portsmouth, in December, the average water temperature is 27.6°C (81.7°F).
Note: For activities in the water such as swimming or diving, temperatures from 25°C (77°F) to 29°C (84.2°F) are considered optimal for prolonged enjoyment without discomfort.

Daylight

With an average of 11h and 12min of daylight, December has the shortest days of the year in Portsmouth.
On the first day of December, sunrise is at 06:17 and sunset at 17:33. On the last day of the month, sunrise is at 06:32 and sunset at 17:45 AST.

Sunshine

December has the least sunshine of the year, with an average of 6h of sunshine.

UV index

December is the month with the lowest UV index in Portsmouth, Dominica, with an average maximum UV index of 8. A UV Index value of 8 to 10 symbolizes a very high health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum UV index, 8 during December, leads to the following recommendations:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 minutes. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Stay cautious! Sand and water reflections increase UV radiation potency.