December weather forecast
Sainte-Marie, Martinique

December in Sainte-Marie, Martinique rounds off the year on a cooler note as temperatures continue to drop and rainfall subsides. An exceptional aspect of December weather is the significant reduction in rainfall to 47mm (1.85") over 20.8 days. The month signals the onset of cooler nights; however, the days remain sunny and bright due to relatively unchanged hours of daylight. The comfortable sea temperatures continue to encourage water-based activities. The final month serves as a refreshing contrast to the humid and high-temperature environment of the peak summer months.

Temperature

As December takes its course, Sainte-Marie's average high-temperature registers at a still moderately hot 27.5°C (81.5°F), closely aligning with the preceding month. In the month of December, Sainte-Marie experiences a minor discrepancy from peak daytime temperatures, settling at an average low-temperature of 26.2°C (79.2°F).

Heat index

In December, the average heat index is estimated at a tropical 30°C (86°F). Continued exposure and engagement in activity might trigger tiredness and subsequently heat cramps.
Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.

Humidity

The average relative humidity in December is 75%.

Rainfall

In December, in Sainte-Marie, the rain falls for 20.8 days. Throughout December, 47mm (1.85") of precipitation is accumulated. In Sainte-Marie, during the entire year, the rain falls for 251.6 days and collects up to 667mm (26.26") of precipitation.

Sea temperature

In December, the average sea temperature is 27.6°C (81.7°F).
Note: Swimming, diving, and other water endeavors at temperatures between 25°C (77°F) and 29°C (84.2°F) are considered enjoyable and satisfying for extended periods without discomfort.

Daylight

December has the shortest days of the year, with an average of 11h and 18min of daylight.
On the first day of December in Sainte-Marie, sunrise is at 06:13 and sunset at 17:32. On the last day of the month, sunrise is at 06:29 and sunset at 17:45 AST.

Sunshine

With an average of 6.4h of sunshine, December has the least sunshine of the year.

UV index

January through December, with an average maximum UV index of 7, are months with the highest UV index in Sainte-Marie. The months with the lowest UV index in Sainte-Marie, Martinique, are January through December, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health risk from exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 7 in December transforms into the following instructions:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Always opt for UVA and UVB-resistant sunglasses on radiant days. Warning! The reflection of sand and water increases the UV dose.