December weather forecast
Mustique, Saint Vincent and the Grenadines

December ushers in the holiday season in Mustique, Saint Vincent and the Grenadines. Rainfall takes a significant dip to 186mm (7.32"), providing a respite from the previous months' showers. Despite shorter daylight hours, consistent warmth lends an inviting aura to the island. Sea temperatures and a moderate UV index tilt favourably towards outdoor exploration. December wraps up the year with holiday charm, infusing the quintessential Caribbean weather with festive cheer.

Temperature

The beginning of December reveals an average high-temperature of a still warm 28°C (82.4°F), showing minimal deviation from the previous month. Mustique records an average low of 21°C (69.8°F) throughout the nights in December.

Rainfall

In Mustique, in December, during 18 rainfall days, 186mm (7.32") of precipitation is typically accumulated. In Mustique, during the entire year, the rain falls for 200 days and collects up to 2447mm (96.34") of precipitation.

Sea temperature

January through April and December, with an average sea temperature of 27°C (80.6°F), are months with the coldest seawater.
Note: Engaging in swimming, diving, or other water activities is highly enjoyable in temperatures ranging from 25°C (77°F) to 29°C (84.2°F), without any unpleasant sensations for prolonged durations.

Daylight

December has the shortest days of the year, with an average of 11h and 24min of daylight.
On the first day of the month, sunrise is at 06:11 and sunset at 17:36. On the last day of December, sunrise is at 06:26 and sunset at 17:49 AST.

Sunshine

January through August, November and December, with an average of 8h of sunshine, are months with the most sunshine.

UV index

With an average maximum UV index of 9, December is the month with the lowest UV index. A UV Index estimate of 8 to 10 represents a very high health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 9 in December transforms into the following instructions:
Skin and eyes are vulnerable without protection. Ensure you always take precautions. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. Enhance your sun protection with tightly woven, yet airy clothing. Frequent application of a broad-spectrum SPF 30+ sunscreen is crucial, reapply it every two hours or immediately post swimming or outdoor exercise. Be mindful! Sand and water reflections can up the Sun's UV exposure.