December weather forecast
Oranjestad, Aruba

December marks the closure of the year, with Oranjestad, Aruba, fully ushering in the winter season. Amusingly, the temperature remains fairly warm despite the cooling attributed to this season. With rainfall hovering around 82mm (3.23") over about 11.4 days, December contributes to the high-rainfall months of the year. However, as the days become shorter, the amount of daylight available for outdoor activities also decreases. Engaged with the weather's changing rhythm, the sea temperature also gradually drops. Despite these changes, December maintains a fairly lively environment suitable for various activities.

Temperature

Oranjestad's December reports an average high-temperature of a still hot 30.4°C (86.7°F), exhibiting a minor difference from November. During December, Oranjestad consistently records a temperature low averaging a moderately hot 25°C (77°F).

Heat index

December's average heat index is estimated at a sweltering 38°C (100.4°F). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.
In the scope of the heat index, its values resonate with shade and light wind conditions. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'feels like' or 'real feel', is a value derived by merging air temperature with the humidity to convey how the climate feels. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. An increase in relative humidity retards evaporation, subsequently reducing the body's heat removal rate and leading to a sensation of being overly warm. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.

Humidity

In December, the average relative humidity is 78.4%.

Rainfall

In December, in Oranjestad, Aruba, the rain falls for 11.4 days. Throughout December, 82mm (3.23") of precipitation is accumulated. Throughout the year, there are 64.6 rainfall days, and 472mm (18.58") of precipitation is accumulated.

Sea temperature

In Oranjestad, the average seawater temperature in December is 27.5°C (81.5°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is perceived as agreeably warm, making all water activities enjoyable without the risk of discomfort over lengthy durations.

Daylight

With an average of 11h and 24min of daylight, December has the shortest days of the year.
On the first day of December in Oranjestad, sunrise is at 06:46 and sunset at 18:12. On the last day of the month, sunrise is at 07:01 and sunset at 18:25 AST.

Sunshine

The months with the most sunshine in Oranjestad are November and December, with an average of 10h of sunshine.

UV index

December is the month with the lowest UV index, with an average maximum UV index of 9. A UV Index value of 8 to 10 symbolizes a very high threat to health from exposure to the Sun's UV rays for ordinary individuals.
Note: In December, the average maximum UV index of 9 translates into the following recommendations:
It is crucial to take precautions; skin and eyes can get damaged if left unprotected. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Always opt for UVA and UVB-resistant sunglasses on radiant days. Regardless of the cloudiness of the day, a sunscreen with SPF 30 or more should be applied and reapplied generously, specifically after swimming or outdoor exercise. Stay alert! Reflective properties of sand and water amplify the Sun's UV radiation.