December weather forecast
Cas Ariba, Aruba

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Weather in December

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.

Frequently asked questions

What is the average December temperature in Cas Ariba?

Cas Ariba in December has an average high-temperature of 27.7°C (81.9°F) and an average low-temperature of 26.7°C (80.1°F). In December, the average heat index (a.k.a. 'real feel', 'feels like'), which factors the actual air temperature with the relative humidity, is appraised at 31°C (87.8°F).

What is the average humidity in December in Cas Ariba?

The average relative humidity in December in Cas Ariba, Aruba, is 79%.

How many days does it rain in December in Cas Ariba?

In December, the rain falls for 22.6 days. Throughout December, 55mm (2.17") of precipitation is accumulated.

What is the month with the shortest days in Cas Ariba?

December has the shortest days of the year in Cas Ariba, with an average of 11h and 24min of daylight.

How many hours of daylight does Cas Ariba have in December?

In Cas Ariba, Aruba, the average day length in December is 11h and 25min.

When are sunrise and sunset in December in Cas Ariba?

In December, on the first day of the month, sunrise is at 06:45 and sunset at 18:12. On the last day of the month, sunrise is at 07:01 and sunset at 18:25 AST.

What is the month with the least sunshine in Cas Ariba?

With an average of 8.2h of sunshine, December has the least sunshine of the year.

How long on average sun shines in December in Cas Ariba?

The average sunshine duration in December in Cas Ariba is 8.2h.

What are the months with the highest UV index in Cas Ariba?

January through December, with an average maximum UV index of 7, are months with the highest UV index in Cas Ariba.

What is the month with the lowest UV index in Cas Ariba?

January through December, with an average maximum UV index of 7, are months with the lowest UV index.

How high is the UV index in December in Cas Ariba?

In Cas Ariba, Aruba, the average daily maximum UV index in December is 7. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation.

Average temperature in December
Cas Ariba, Aruba

Average temperature in December - Cas Ariba, Aruba
  • Average high temperature in December: 27.7°C

The warmest month (with the highest average high temperature) is September (29°C).
The month with the lowest average high temperature is February (26.4°C).

  • Average low temperature in December: 26.7°C

The month with the highest average low temperature is September (28.3°C).
The coldest month (with the lowest average low temperature) is February (25.8°C).

Average pressure in December
Cas Ariba, Aruba

Average pressure in December - Cas Ariba, Aruba
  • Average pressure in December: 1011.4mbar

The month with the highest atmospheric pressure is January (1012.6mbar).
The month with the lowest atmospheric pressure is October (1009.6mbar).

Average wind speed in December
Cas Ariba, Aruba

Average wind speed in December - Cas Ariba, Aruba
  • Average wind speed in December: 32.4km/h

The windiest month (with the highest average wind speed) is June (37.5km/h).
The calmest month (with the lowest average wind speed) is November (26.1km/h).

Average humidity in December
Cas Ariba, Aruba

Average humidity in December - Cas Ariba, Aruba
  • Average humidity in December: 79%

The month with the highest relative humidity is May (83%).
The month with the lowest relative humidity is November (78%).

Average rainfall in December
Cas Ariba, Aruba

Average rainfall in December - Cas Ariba, Aruba
  • Average rainfall in December: 55mm

The wettest month (with the highest rainfall) is October (110mm).
The driest month (with the least rainfall) is June (15mm).

Average rainfall days in December
Cas Ariba, Aruba

Average rainfall days in December - Cas Ariba, Aruba
  • Average rainfall days in December: 22.6 days

The month with the highest number of rainy days is November (23.9 days).
The month with the least rainy days is June (10.6 days).

Average daylight in December /
Average sunshine in December
Cas Ariba, Aruba

Average daylight in December / Average sunshine in December - Cas Ariba, Aruba
  • Average daylight in December: 11h and 2min

The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 24min).

  • Average sunshine in December: 8h and 1min

The month with the most sunshine is August (Average sunshine: 9h and 30min).
The month with the least sunshine is December (Average sunshine: 8h and 12min).

Average sunshine days in December
Cas Ariba, Aruba

Average sunshine days in December - Cas Ariba, Aruba
  • Average sunshine days in December: 3.3 days

The month with the most sunshine days is August (14.8 days).
The month with the least sunshine days is November (2.1 days).

Average UV index in December
Cas Ariba, Aruba

Average UV index in December - Cas Ariba, Aruba
  • Average UV index in December: 7

The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).

Average cloud cover in December
Cas Ariba, Aruba

Average cloud cover in December - Cas Ariba, Aruba
  • Average cloud cover in December: 41

The months with the most cloud cover are March and November (Cloud cover 42).
The month with the least cloud cover is September (Cloud cover 26).

Average visibility in December
Cas Ariba, Aruba

Average visibility in December - Cas Ariba, Aruba
  • Average visibility in December: 10km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).

Cas Ariba, Aruba

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