December weather forecast
Portsmouth, Dominica

Weather in December

December, the first month of the winter in Portsmouth, is also a moderately hot month, with temperature in the range of an average high of 29°C (84.2°F) and an average low of 22°C (71.6°F).

Temperature

In December, the average high-temperature is essentially the same as in November - a moderately hot 29°C (84.2°F). In Portsmouth, Dominica, in December, the average low-temperature is 22°C (71.6°F).

Rainfall

In December, the rain falls for 18 days. Throughout December, 201mm (7.91") of precipitation is 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, the average seawater temperature in December is 27.6°C (81.7°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

With an average of 11h and 13min of daylight, December has the shortest days of the year in Portsmouth.
On the first day of December in Portsmouth, sunrise is at 06:16 and sunset at 17:33. On the last day of the month, sunrise is at 06:32 and sunset at 17:45 AST.

Sunshine

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

UV index

December is the month with the lowest UV index in Portsmouth, with an average maximum UV index of 8. A UV Index value of 8 to 10 symbolizes a very high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: The average daily UV index of 8 in December transform into the following instructions:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. 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. A wide-brim hat offers excellent sun protection for the 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. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
[Resources]

FAQ

What is the temperature in December in Portsmouth?

The average high-temperature, in December, in Portsmouth, Dominica, 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, in December, it is raining for 18 days, with typically 201mm (7.91") of accumulated precipitation.

How warm is the water in December in Portsmouth?

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

December has the shortest days of the year in Portsmouth, with an average of 11h and 13min of daylight.

How many hours of daylight does Portsmouth have in December?

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

When are sunrise and sunset in December in Portsmouth?

On the first day of December in Portsmouth, Dominica, sunrise is at 06:16 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?

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

How many hours of sunshine does Portsmouth have in December?

The average sunshine duration in December in Portsmouth is 6h.

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

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

What is the UV index intensity in December in Portsmouth?

The average daily maximum UV index in December in Portsmouth is 8. A UV Index reading of 8 to 10 represents a very high health risk from exposure to Sun's UV rays.
Average rainfall days
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 13min

The month with the longest days is June (Average daylight: 13h and 2min).
The month with the shortest days is December (Average daylight: 11h and 13min).

  • 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]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location