Oranjestad
Aruba
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Oranjestad, Aruba

The outstanding perspective of the Dutch colonial architecture in Oranjestad, Aruba
The outstanding perspective of the Dutch colonial architecture in Oranjestad, Aruba
The first month of the winter, December, is still a tropical month in Oranjestad, Aruba, with average temperature fluctuating between 30.4°C (86.7°F) and 25°C (77°F).

Temperature

In December, the average high-temperature is almost the same as in November - a still tropical 30.4°C (86.7°F). In December, the average low-temperature is 25°C (77°F).

Heat index

The average heat index is evaluated at a very hot 38.4°C (101.1°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the 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 'felt air temperature', 'feels like', 'apparent temperature', or 'real feel', is a measure that combines both air temperature and relative humidity into a single value that indicates how hot the weather feels. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, pregnancy, wind), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in Oranjestad is 78.4%.

Rainfall

In Oranjestad, in December, it is raining for 11.4 days, with typically 81.8mm (3.2") of accumulated precipitation. In Oranjestad, during the entire year, the rain falls for 64.6 days and collects up to 471.8mm (18.6") of precipitation.

Sea temperature

In Oranjestad, Aruba, the average seawater temperature is 27.5°C (81.5°F).
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

The month with the shortest days is December, with an average of 11.4h of daylight.

Sunshine

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

UV index

With an average maximum UV index of 9, December is the month with the lowest UV index in Oranjestad. A UV Index value of 8 to 10 symbolizes a very high health risk from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 9 transform into the following instructions:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in December in Oranjestad?

The average high-temperature, in December, is 30.4°C (86.7°F), while the average low-temperature is 25°C (77°F). In December, the average heat index (a.k.a. 'apparent temperature', 'real feel'), that combines relative humidity and air temperature, is calculated to 38.4°C (101.1°F).

What is the average humidity in December in Oranjestad?

In December, the average relative humidity in Oranjestad, Aruba, is 78.4%.

How much does it rain in Oranjestad in December?

In Oranjestad, in December, during 11.4 rainfall days, 81.8mm (3.2") of precipitation is typically accumulated.

What is the water temperature in December in Oranjestad?

In Oranjestad, in December, the average water temperature is 27.5°C (81.5°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the month with the shortest days in Oranjestad?

December has the shortest days of the year, with an average of 11.4h of daylight.

What is the average length of the day in December in Oranjestad?

The average length of the day in December is 11.4h.

What are the months with the most sunshine in Oranjestad?

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

How long on average sun shines in December in Oranjestad?

In December, the average sunshine is 10h.

What is the month with the lowest UV index in Oranjestad?

With an average maximum UV index of 9, December is the month with the lowest UV index in Oranjestad.

How high is the UV index in December in Oranjestad?

The average daily maximum UV index in December is 9. A UV Index value of 8 to 10 symbolizes a very high health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in December - Oranjestad, Aruba
  • Average high temperature in December: 30.4°C

The warmest month (with the highest average high temperature) is September (32.7°C).
The month with the lowest average high temperature is January (30°C).

  • Average low temperature in December: 25°C

The month with the highest average low temperature is September (26.9°C).
The coldest month (with the lowest average low temperature) is January (24.5°C).

Average humidity in December - Oranjestad, Aruba
  • Average humidity in December: 78.4%

The month with the highest relative humidity is November (79.1%).
The month with the lowest relative humidity is March (75.7%).

Average rainfall in December - Oranjestad, Aruba
  • Average rainfall in December: 81.8mm

The wettest month (with the highest rainfall) is November (94mm).
The driest month (with the lowest rainfall) is March (8.7mm).

Average rainfall days in December - Oranjestad, Aruba
  • Average rainfall days in December: 11.4 days

The month with the highest number of rainy days is December (11.4 days).
The month with the lowest number of rainy days is March (1.8 days).

Average sea temperature in December - Oranjestad, Aruba
  • Average sea temperature in December: 27.5°C

The best month for swimming (with the highest average sea temperature) is October (29.2°C).
The coldest month (with the lowest average sea temperature) is February (26.3°C).

Average daylight in December / Average sunshine in December - Oranjestad, Aruba
  • Average daylight in December: 11.4h

The month with the longest days is June (Average daylight: 12.9h).
The month with shortest days is December (Average daylight: 11.4h).

  • Average sunshine in December: 10h

Months with most sunshine are November and December (Average sunshine: 10h).
The month with least sunshine is April (Average sunshine: 3h).

Average UV index in December - Oranjestad, Aruba
  • Average UV index in December: 9

Months with the highest UV index are February, March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 9).