Roseau
Dominica
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Roseau, Dominica

A calm, clear waterfront in the valley city of Roseau, Dominica, with mountains afar
A calm, clear waterfront in the valley city of Roseau, Dominica, with mountains afar
The first month of the winter, December, is still a warm month in Roseau, Dominica, with temperature in the range of an average high of 29°C (84.2°F) and an average low of 21°C (69.8°F).

Temperature

January, February and December, with an average high-temperature of 29°C (84.2°F), are the coldest months.

Rainfall

In December, in Roseau, the rain falls for 19 days. Throughout December, 176mm (6.9") of precipitation is accumulated. Throughout the year, in Roseau, there are 218 rainfall days, and 1996mm (78.6") of precipitation is accumulated.

Sea temperature

In Roseau, the average seawater temperature is 27°C (80.6°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 in Roseau, with an average of 11.2h of daylight.

Sunshine

January, February, September through December, with an average of 7h of sunshine, are months with the least sunshine in Roseau.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 8. A UV Index estimate of 8 to 10 represents a very high health vulnerability from the exposure to the Sun's UV radiation for average individuals.
Note: In December, the average maximum UV index of 8 translate into the following recommendations:
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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What are the coldest months in Roseau?

January, February and December, with an average high-temperature of 29°C (84.2°F), are the coldest months.

What is the temperature in December in Roseau?

The average high-temperature, in December, in Roseau, Dominica, is 29°C (84.2°F), while the average low-temperature is 21°C (69.8°F).

How much does it rain in Roseau in December?

In Roseau, Dominica, in December, it is raining for 19 days, with typically 176mm (6.9") of accumulated precipitation.

What is the sea water temperature in December in Roseau?

In December, the average sea temperature is 27°C (80.6°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

What is the month with the shortest days in Roseau?

December has the shortest days of the year in Roseau, Dominica, with an average of 11.2h of daylight.

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

The average length of the day in December is 11.2h.

What is the month with the least sunshine in Roseau?

Months with the least sunshine in Roseau are January, February, September through December, with an average of 7h of sunshine.

How many hours of sunshine does Roseau have in December?

In December, the average sunshine in Roseau is 7h.

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

The month with the lowest UV index in Roseau is December, with an average maximum UV index of 8.

How high is the UV index in December in Roseau?

In December, the average daily maximum UV index in Roseau, Dominica, is 8. A UV Index of 8 to 10 symbolizes a very high health risk from the exposure to the Sun's UV radiation.
Average temperature in December - Roseau, Dominica
  • Average high temperature in December: 29°C

Warmest months (with the highest average high temperature) are May, June, July, August, September and October (31°C).
Months with the lowest average high temperature are January, February and December (29°C).

  • Average low temperature in December: 21°C

The month with the highest average low temperature is August (24°C).
Coldest months (with the lowest average low temperature) are January, February, March and December (21°C).

Average rainfall in December - Roseau, Dominica
  • Average rainfall in December: 176mm

The wettest month (with the highest rainfall) is November (252mm).
Driest months (with the lowest rainfall) are February and April (87mm).

Average rainfall days in December - Roseau, Dominica
  • Average rainfall days in December: 19 days

The month with the highest number of rainy days is September (23 days).
Months with the lowest number of rainy days are February and April (14 days).

Average sea temperature in December - Roseau, Dominica
  • Average sea temperature in December: 27°C

Best months for swimming (with the highest average sea temperature) are September and October (29°C).
Coldest months (with the lowest average sea temperature) are February and March (26°C).

Average daylight in December / Average sunshine in December - Roseau, Dominica
  • Average daylight in December: 11.2h

The month with the longest days is June (Average daylight: 13h).
The month with shortest days is December (Average daylight: 11.2h).

  • Average sunshine in December: 7h

Months with most sunshine are March, April, May, June, July and August (Average sunshine: 8h).
Months with least sunshine are January, February, September, October, November and December (Average sunshine: 7).

Average UV index in December - Roseau, Dominica
  • Average UV index in December: 8

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 8).