December weather forecast
Portsmouth, Dominica

englishespañol中文
Share

Weather in December

In December, Portsmouth braces for a substantial decrease in the number of daylight hours, dropping to an average of 11.2. The city experiences a notable reduction in rainfall when compared to November, receiving roughly 201mm (7.91") of rainfall. This shift in weather phenomena sets the stage for the sun-drenched, drier season commencing in the new year. December marks the descent to the shortest day of the year. Meanwhile, the UV index dips to 8, its annual low.

Temperature

The introduction of December notes a subtle temperature variation to a moderately hot 29°C (84.2°F) from November's 30°C (86°F). Portsmouth experiences an average low-temperature of 22°C (71.6°F) in month of December.

Rainfall

In Portsmouth, in December, during 18 rainfall days, 201mm (7.91") of precipitation is typically accumulated. In Portsmouth, during the entire year, the rain falls for 214 days and collects up to 2252mm (88.66") of precipitation.

Sea temperature

In Portsmouth, in December, the average water temperature is 27.6°C (81.7°F).
Note: For activities in the water such as swimming or diving, temperatures from 25°C (77°F) to 29°C (84.2°F) are considered optimal for prolonged enjoyment without discomfort.

Daylight

With an average of 11h and 12min of daylight, December has the shortest days of the year in Portsmouth.
On the first day of December, sunrise is at 06:17 and sunset at 17:33. On the last day of the month, sunrise is at 06:32 and sunset at 17:45 AST.

Sunshine

December has the least sunshine of the year, with an average of 6h of sunshine.

UV index

December is the month with the lowest UV index in Portsmouth, Dominica, with an average maximum UV index of 8. A UV Index value of 8 to 10 symbolizes a very high health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum UV index, 8 during December, leads to the following recommendations:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 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. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Stay cautious! Sand and water reflections increase UV radiation potency.
[Resources]

Frequently asked questions

How hot is it in Portsmouth in December?

The average high-temperature, in December, in Portsmouth, is 29°C (84.2°F), while the average low-temperature is 22°C (71.6°F).

How much does it rain in Portsmouth in December?

In Portsmouth, Dominica, during December, the rain falls for 18 days and regularly aggregates up to 201mm (7.91") of precipitation.

What is the sea water temperature in December in Portsmouth?

In Portsmouth, in December, the average water temperature is 27.6°C (81.7°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 Portsmouth?

The month with the shortest days in Portsmouth, Dominica, is December, with an average of 11h and 12min of daylight.

How many hours of daylight does Portsmouth have in December?

In Portsmouth, the average day length in December is 11h and 13min.

When is the sunrise / sunset in December in Portsmouth?

On the first day of December in Portsmouth, sunrise is at 06:17 and sunset at 17:33. On the last day of the month, sunrise is at 06:32 and sunset at 17:45 AST.

What is the month with the least sunshine in Portsmouth?

The month with the least sunshine is December, with an average of 6h of sunshine.

How many hours of sunshine does Portsmouth have in December?

In Portsmouth, the average sunshine duration in December is 6h.

When is the lowest UV index in Portsmouth?

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

What is the UV index reading in December in Portsmouth?

In December, the average daily maximum UV index is 8. A UV Index of 8 to 10 symbolizes a very high hazard to health from exposure to Sun's UV rays.
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in December
Portsmouth, Dominica

Average temperature in December - Portsmouth, Dominica
  • Average high temperature in December: 29°C

The warmest months (with the highest average high temperature) are June, July, August and September (31°C).
The month with the lowest average high temperature is January (28°C).

  • Average low temperature in December: 22°C

The months with the highest average low temperature are July, August and September (24°C).
The coldest months (with the lowest average low temperature) are January, February and March (21°C).

[Resources]

Average rainfall in December
Portsmouth, Dominica

Average rainfall in December - Portsmouth, Dominica
  • Average rainfall in December: 201mm

The wettest month (with the highest rainfall) is November (300mm).
The driest month (with the least rainfall) is February (95mm).

[Resources]

Average rainfall days in December
Portsmouth, Dominica

Average rainfall days in December - Portsmouth, Dominica
  • Average rainfall days in December: 18 days

The month with the highest number of rainy days is September (22 days).
The months with the least rainy days are February and April (14 days).

[Resources]

Average sea temperature in December
Portsmouth, Dominica

Average sea temperature in December - Portsmouth, Dominica
  • Average sea temperature in December: 27.6°C

The best month for swimming (with the highest average sea temperature) is September (29.4°C).
The coldest month (with the lowest average sea temperature) is February (26.7°C).

[Resources]

Average daylight in December /
Average sunshine in December
Portsmouth, Dominica

Average daylight in December / Average sunshine in December - Portsmouth, Dominica
  • Average daylight in December: 11h and 1min

The month with the longest days is June (Average daylight: 13h and 0min).
The month with the shortest days is December (Average daylight: 11h and 12min).

  • Average sunshine in December: 6h

The months with the most sunshine are March, April, May, June, July and August (Average sunshine: 8h).
The month with the least sunshine is December (Average sunshine: 6h).

[Resources]

Average UV index in December
Portsmouth, Dominica

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

The 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).

[Resources]

Portsmouth, Dominica

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location