Monthly weather forecast and climate
Portsmouth, Dominica

Weather in January

January, like December, in Portsmouth, Dominica, is another warm winter month, with temperature in the range of an average high of 28°C (82.4°F) and an average low of 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 January, the rain falls for 18 days and regularly aggregates up to 144mm (5.67") of precipitation. Weather in January »

Weather in February

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

Weather in March

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

Weather in April

April is a tropical spring month in Portsmouth, Dominica, with temperature in the range of an average high of 30°C (86°F) and an average low of 22°C (71.6°F). In Portsmouth, Dominica, the average high-temperature in April is almost the same as in March - a tropical 30°C (86°F). Weather in April »

Weather in May

May, the last month of the spring, in Portsmouth, is also a hot month, with temperature in the range of an average low of 23°C (73.4°F) and an average high of 30°C (86°F). In Portsmouth, the average high-temperature in May remains the same as in April - a still hot 30°C (86°F). Weather in May »

Weather in June

June, the first month of the summer, in Portsmouth, is still a hot 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 »

Weather in July

July, the same as June, in Portsmouth, Dominica, is another tropical summer month, 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). In July, in Portsmouth, the rain falls for 20 days. Weather in July »

Weather in August

The last month of the summer, August, is another hot month in Portsmouth, Dominica, with average temperature fluctuating between 24°C (75.2°F) and 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 August »

Weather in September

September, the first month of the autumn, in Portsmouth, is still a hot month, with average temperature fluctuating between 24°C (75.2°F) and 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 September »

Weather in October

October, like September, is a hot autumn month in Portsmouth, Dominica, with temperature in the range of an average high of 30°C (86°F) and an average low of 23°C (73.4°F). In Portsmouth, the average high-temperature in October is essentially the same as in September - a still tropical 30°C (86°F). Weather in October »

Weather in November

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

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). In December, the average high-temperature is relatively the same as in November - a warm 29°C (84.2°F). Weather in December »
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FAQ

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, there are 214 rainfall days, and 2252mm (88.66") of precipitation is accumulated.

What is the driest month in Portsmouth?

February is the month with the least rainfall in Portsmouth. Rain falls for 14 days and accumulates 95mm (3.74") of precipitation.

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

The month with the coldest seawater 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 in Portsmouth are March through August, with an average of 8h of sunshine.

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

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

What are the warmest months in Portsmouth?

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

When are the longest days in Portsmouth?

The month with the longest days is June, with an average of 13h of daylight.

What month is the sea warmest in Portsmouth?

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

What is the rainiest month in Portsmouth?

November is the month with the most rainfall in Portsmouth. Rain falls for 19 days and accumulates 300mm (11.81") of precipitation.

What is the month with the shortest days in Portsmouth?

The month with the shortest days in Portsmouth 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.

When is the lowest UV index in Portsmouth?

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

Average temperature
Portsmouth, Dominica

Average temperature - Portsmouth, Dominica

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).

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).

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Average rainfall
Portsmouth, Dominica

Average rainfall - Portsmouth, Dominica

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

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Average rainfall days
Portsmouth, Dominica

Average rainfall days - Portsmouth, Dominica

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

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Average sea temperature
Portsmouth, Dominica

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).

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Average daylight / Average sunshine
Portsmouth, Dominica

Average daylight / Average sunshine - Portsmouth, Dominica

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

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).

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Average UV index
Portsmouth, Dominica

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).

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