December weather forecast
Port-au-Prince, Haiti

December, the last month of the year, marks the onset of the cool dry season in Port-au-Prince. The rainfall further decreases to 19mm (0.75"), and the temperature varies between 18.6°C (65.5°F) and 27.8°C (82°F), creating pleasantly cool conditions. The sea temperature sees a minor decrease to 28.3°C (82.9°F) yet remains warm enough for swimming. The relative humidity also slows down to 76%, resulting in a comfortable atmosphere for a stroll or outdoor dining. Rounding up the year, the average wind speed holds steady at 7.9km/h (4.9mph), offering a refreshing breeze. Outdoor lovers still enjoy 11 hours of daylight, offering ample time to explore and appreciate the city's allure.

Temperature

As Port-au-Prince steps into December, the average high-temperature holds at a still moderately hot 27.8°C (82°F), hinting at a minor fluctuation from the prior month. The average temperature during December nights dips to an enjoyable 18.6°C (65.5°F).

Heat index

The heat index value for December is estimated at a tropical 31°C (87.8°F). Fatigue might occur with continuous exposure and activity, potentially causing heat cramps.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', provides an understanding of perceived warmth by combining temperature and relative humidity. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to 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

In December, the average relative humidity in Port-au-Prince, Haiti, is 76%.

Rainfall

In Port-au-Prince, in December, during 10.5 rainfall days, 19mm (0.75") of precipitation is typically accumulated. In Port-au-Prince, during the entire year, the rain falls for 227.4 days and collects up to 904mm (35.59") of precipitation.

Sea temperature

In Port-au-Prince, the average seawater temperature in December is 28.3°C (82.9°F).
Note: Temperatures between 25°C (77°F) and 29°C (84.2°F) in water are ideal for swimming, diving, and other activities, providing enjoyment and comfort for extended durations.

Daylight

December has the shortest days of the year, with an average of 11h and 0min of daylight.
On the first day of the month, sunrise is at 06:05 and sunset at 17:11. On the last day of December, sunrise is at 06:21 and sunset at 17:23 EST.

Sunshine

In December, the average sunshine in Port-au-Prince is 7.3h.

UV index

The months with the lowest UV index in Port-au-Prince are January through May, July through December, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index of 6 during December translates into the following directions:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. Enhance your sun protection with tightly woven, yet airy clothing. Be careful! The Sun's UV radiation is accentuated by reflecting off sand and water.