December weather forecast
Willemstad, Curaçao

The last month of the year in Willemstad, December, bids farewell to the warm season amidst reduced temperature and continued showers. December weather indicates the climatic transition from the wet to the dry season with the highest rainfall volume recorded at 100mm (3.94"). Decreasing maximum temperature values bring a refreshing relief from the past high-temperature months. A gradual decrease in sea temperature, shorter daylight hours, and relatively constant UV index marks the onset of winter. Rounding out the year in a festive spirit, December in Willemstad presents a mesmerizing blend of temperate climate and serene beauty.

Temperature

December's arrival brings an average high-temperature of a still hot 30.1°C (86.2°F), slightly deviating from November's 31.1°C (88°F). Throughout the month of December, Willemstad reports a steady low-temperature average of 24.8°C (76.6°F).

Heat index

The heat index value during December is evaluated at a sweltering 38°C (100.4°F). Implement enhanced safety actions, heat cramps and heat exhaustion could occur. Sustained activity might result in heatstroke.
Records show heat index calculations are tailored for shaded regions and mild winds. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', reflects the blend of air temperature and relative humidity to give a temperature impression. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
Perspiration and the resultant sweat evaporation are the body's natural thermostat, helping regulate temperature. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.

Humidity

In December, the average relative humidity is 78.9%.

Rainfall

The month with the most rainfall in Willemstad is December, when the rain falls for 11.5 days and typically aggregates up to 100mm (3.94") of precipitation.

Sea temperature

In December, the average sea temperature is 27°C (80.6°F).
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

The month with the shortest days is December, with an average of 11h and 24min of daylight.
On the first day of December in Willemstad, sunrise is at 06:40 and sunset at 18:08. On the last day of the month, sunrise is at 06:55 and sunset at 18:21 AST.

Sunshine

The month with the least sunshine in Willemstad is December, with an average of 7.8h of sunshine.

UV index

The month with the lowest UV index in Willemstad is December, with an average maximum UV index of 9. A UV Index value of 8 to 10 symbolizes a very high health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 9 in December converts into the following recommendations:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 minutes. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Even on overcast days, ensure the application and frequent reapplication of sunscreen with at least an SPF 30, especially post swim or outdoor exercise. Attention! UV strength is notably upped by the reflection of sand and water.