Portsmouth
Dominica
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Portsmouth, Dominica

January, like December, in Portsmouth, Dominica, is another warm winter month, with average temperature varying between 28°C (82.4°F) and 21°C (69.8°F). January is the coldest month, with an average high-temperature of 28°C (82.4°F) and an average low-temperature of 21°C (69.8°F). In Portsmouth, during 18 rainfall days, 144mm (5.7") of precipitation is typically accumulated. Weather in January »

The last month of the winter, February, is also a moderately hot month in Portsmouth, Dominica, with average temperature varying between 29°C (84.2°F) and 21°C (69.8°F). In February, the average high-temperature is practically the same as in January - a still warm 29°C (84.2°F). Weather in February »

The first month of the spring, March, is still a warm month in Portsmouth, Dominica, with average temperature ranging between min 21°C (69.8°F) and max 29°C (84.2°F). In Portsmouth, the average high-temperature remains the same as in February - a still warm 29°C (84.2°F). Weather in March »

April is a hot spring month in Portsmouth, Dominica, with average temperature fluctuating between 22°C (71.6°F) and 30°C (86°F). In Portsmouth, the average high-temperature is practically the same as in March - a hot 30°C (86°F). Weather in April »

The last month of the spring, May, is another hot month in Portsmouth, Dominica, with average temperature ranging between min 23°C (73.4°F) and max 30°C (86°F). In Portsmouth, Dominica, the average high-temperature remains the same as in April - a still hot 30°C (86°F). Weather in May »

June, the first month of the summer, in Portsmouth, is still a tropical month, with temperature in the range of an average high of 31°C (87.8°F) and an average low of 23°C (73.4°F). The warmest months are June through September, with an average high-temperature of 31°C (87.8°F). Weather in June »

July, like June, is a hot summer month in Portsmouth, Dominica, with average temperature ranging between min 24°C (75.2°F) and max 31°C (87.8°F). The warmest months are June through September, with an average high-temperature of 31°C (87.8°F). Weather in July »

The last month of the summer, August, is another tropical month in Portsmouth, Dominica, with average temperature ranging between max 31°C (87.8°F) and min 24°C (75.2°F). June through September, with an average high-temperature of 31°C (87.8°F), are the warmest months. In August, in Portsmouth, Dominica, the rain falls for 20 days. Weather in August »

September, the first month of the autumn, in Portsmouth, is also a hot month, with average temperature ranging between max 31°C (87.8°F) and min 24°C (75.2°F). June through September, with an average high-temperature of 31°C (87.8°F), are the warmest months. Weather in September »

October, the same as September, in Portsmouth, Dominica, is a hot autumn month, with average temperature fluctuating between 23°C (73.4°F) and 30°C (86°F). In October, the average high-temperature is relatively the same as in September - a still tropical 30°C (86°F). Weather in October »

November, the last month of the autumn, in Portsmouth, is another tropical month, with average temperature varying between 22°C (71.6°F) and 30°C (86°F). In Portsmouth, the average high-temperature in November remains the same as in October - a still hot 30°C (86°F). Weather in November »

The first month of the winter, December, is still a warm month in Portsmouth, Dominica, 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). In Portsmouth, the average high-temperature is relatively the same as in November - a moderately hot 29°C (84.2°F). Weather in December »

What is the coldest month in Portsmouth?

January is the coldest month, with an average high-temperature of 28°C (82.4°F) and an average low-temperature of 21°C (69.8°F).

How many days does it rain in Portsmouth?

Throughout the year, in Portsmouth, Dominica, there are 214 rainfall days, and 2252mm (88.7") of precipitation is accumulated.

What is the driest month in Portsmouth?

The month with the least rainfall in Portsmouth is February when the rain falls for 14 days and typically collects 95mm (3.7") of precipitation.

What month is the sea coldest in Portsmouth?

The month with the coldest seawater in Portsmouth, Dominica, is February, with an average sea temperature of 26.7°C (80.1°F).

What are the months with the most sunshine in Portsmouth?

Months with the most sunshine are March through August, with an average of 8h of sunshine.

When is the highest UV index in Portsmouth?

Months with the highest UV index are March through September, with an average maximum UV index of 12.

What is the warmest month in Portsmouth?

June through September, with an average high-temperature of 31°C (87.8°F), are warmest months in Portsmouth, Dominica.

When are the longest days in Portsmouth?

June has the longest days of the year in Portsmouth, Dominica, with an average of 13h of daylight.

What is the month with the warmest sea water in Portsmouth?

The month with the warmest seawater is September, with an average sea temperature of 29.4°C (84.9°F).

What is the rainiest month in Portsmouth?

November is the month with the most rainfall. Rain falls for 19 days and accumulates 300mm (11.8") of precipitation.

What is the month with the shortest days in Portsmouth?

The month with the shortest days is December, with an average of 11.2h of daylight.

What is the month with the least sunshine in Portsmouth?

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

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

The month with the lowest UV index in Portsmouth, Dominica, is December, with an average maximum UV index of 8.
Average temperature - Portsmouth, Dominica
Average rainfall - Portsmouth, Dominica

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

Average rainfall days - Portsmouth, Dominica

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

Average sea temperature - Portsmouth, Dominica

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).

Average daylight / Average sunshine - Portsmouth, Dominica

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

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

Average UV index - Portsmouth, Dominica

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).