Santo Domingo
Dominican Republic
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Santo Domingo, Dominican Republic

The Palace building in Santo Domingo, housing the National offices of the President and Vice President of the Dominican Republic
The Palace building in Santo Domingo, housing the National offices of the President and Vice President of the Dominican Republic
December, the first month of the winter, in Santo Domingo, is still a warm month, with average temperature varying between 20.3°C (68.5°F) and 29.6°C (85.3°F).

Temperature

In Santo Domingo, the average high-temperature is almost the same as in November - a moderately hot 29.6°C (85.3°F). In Santo Domingo, in December, the average low-temperature is 20.3°C (68.5°F).

Heat index

The average heat index in December is estimated at a torrid 37.3°C (99.1°F). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. 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 'feels like', 'felt air temperature', 'apparent temperature', or 'real feel', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like pregnancy, metabolic differences, differences in body mass, height, and shape, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. 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.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. 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

In Santo Domingo, the average relative humidity in December is 83.3%.

Rainfall

In Santo Domingo, it is raining for 9 days, with typically 84.3mm (3.3") of accumulated precipitation. In Santo Domingo, during the entire year, the rain falls for 115.4 days and collects up to 1447.1mm (57") of precipitation.

Sea temperature

In Santo Domingo, the average water temperature is 27.8°C (82°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

December has the shortest days of the year, with an average of 11h of daylight.

Sunshine

January and December, with an average of 5.7h of sunshine, are months with the least sunshine.

UV index

With an average maximum UV index of 7, December is the month with the lowest UV index in Santo Domingo. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 7 transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.

What is the temperature in December in Santo Domingo?

The average high-temperature, in December, in Santo Domingo, Dominican Republic, is 29.6°C (85.3°F), while the average low-temperature is 20.3°C (68.5°F). The average heat index (a.k.a. 'real feel', 'felt air temperature'), that factores the actual air temperature with the relative humidity, in December is evaluated at 37.3°C (99.1°F).

What is the average humidity in December in Santo Domingo?

The average relative humidity in December in Santo Domingo is 83.3%.

How much does it rain in Santo Domingo in December?

In December, in Santo Domingo, Dominican Republic, the rain falls for 9 days. Throughout December, 84.3mm (3.3") of precipitation is accumulated.

What is the sea water temperature in December in Santo Domingo?

In Santo Domingo, in December, the average water temperature is 27.8°C (82°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

What is the month with the shortest days in Santo Domingo?

With an average of 11h of daylight, December has the shortest days of the year in Santo Domingo.

How many hours of daylight does Santo Domingo have in December?

In Santo Domingo, the average length of the day in December is 11h.

What is the month with the least sunshine in Santo Domingo?

Months with the least sunshine in Santo Domingo, Dominican Republic, are January and December, with an average of 5.7h of sunshine.

How long on average sun shines in December in Santo Domingo?

The average sunshine in December in Santo Domingo is 5.7h.

When is the lowest UV index in Santo Domingo?

The month with the lowest UV index is December, with an average maximum UV index of 7.

What is the UV index reading in December in Santo Domingo?

In December, the average daily maximum UV index in Santo Domingo, Dominican Republic, is 7. A UV Index estimate of 6 to 7 represents a high health threat from the exposure to the Sun's UV rays.
Average temperature in December - Santo Domingo, Dominican Republic
  • Average high temperature in December: 29.6°C

The warmest month (with the highest average high temperature) is August (31.5°C).
Months with the lowest average high temperature are January and February (29.2°C).

  • Average low temperature in December: 20.3°C

The month with the highest average low temperature is June (22.9°C).
The coldest month (with the lowest average low temperature) is January (19.6°C).

Average humidity in December - Santo Domingo, Dominican Republic
  • Average humidity in December: 83.3%

The month with the highest relative humidity is October (85.7%).
The month with the lowest relative humidity is April (78.8%).

Average rainfall in December - Santo Domingo, Dominican Republic
  • Average rainfall in December: 84.3mm

The wettest month (with the highest rainfall) is May (187.7mm).
The driest month (with the lowest rainfall) is March (53.8mm).

Average rainfall days in December - Santo Domingo, Dominican Republic
  • Average rainfall days in December: 9 days

The month with the highest number of rainy days is October (13 days).
Months with the lowest number of rainy days are February and March (6.3 days).

Average sea temperature in December - Santo Domingo, Dominican Republic
  • Average sea temperature in December: 27.8°C

The best month for swimming (with the highest average sea temperature) is September (29.3°C).
Coldest months (with the lowest average sea temperature) are February and March (26.3°C).

Average daylight in December / Average sunshine in December - Santo Domingo, Dominican Republic
  • Average daylight in December: 11h

The month with the longest days is June (Average daylight: 13.2h).
The month with shortest days is December (Average daylight: 11h).

  • Average sunshine in December: 5.7h

The month with most sunshine is March (Average sunshine: 7.4h).
Months with least sunshine are January and December (Average sunshine: 5.7).

Average UV index in December - Santo Domingo, Dominican Republic
  • Average UV index in December: 7

Months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 7).