December weather forecast
Cas Ariba, Aruba

December, the final act in Cas Ariba's weather calendar, brings back echoes of January's conditions. The city finishes the year maintaining its typical patterns, characterized by heavy sunshine and moderate temperatures. Compared to November, December records a reduction in rainfall, winding down to 55mm (2.17"). Even as daylight hours shrink to their annual low, the city's average temperature remains agreeably warm. Despite the onset of winter in large parts of the world, Cas Ariba retains its essence of year-round summer.

Temperature

The arrival of December in Cas Ariba brings an average high-temperature of a still moderately hot 27.7°C (81.9°F), closely following the temperature pattern of November. Cas Ariba maintains a consistent average nighttime low-temperature of 26.7°C (80.1°F) throughout December.

Heat index

In December, the average heat index is appraised at a tropical 31°C (87.8°F). With unrelenting exposure and activity, one might experience exhaustion, leading to potential 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 'apparent temperature' or 'feels like', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.

Humidity

In December, the average relative humidity in Cas Ariba is 79%.

Rainfall

In Cas Ariba, during December, the rain falls for 22.6 days and regularly aggregates up to 55mm (2.17") of precipitation. In Cas Ariba, during the entire year, the rain falls for 184.2 days and collects up to 472mm (18.58") of precipitation.

Daylight

The month with the shortest days is December, with an average of 11h and 24min of daylight.
On the first day of the month, sunrise is at 06:45 and sunset at 18:12. On the last day of December, sunrise is at 07:01 and sunset at 18:25 AST.

Sunshine

With an average of 8.2h 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 Cas Ariba. January through December, with an average maximum UV index of 7, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for average individuals.
Note: The UV index of 7 during December leads to these advisories:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 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. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.