July weather forecast
Portsmouth, Dominica

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Weather in July

Portsmouth experiences peak rainfall in July, with the average precipitation rising to 156mm (6.14"). The sea temperature soars to 28.7°C (83.7°F), which, along with stable sunlight hours, makes any beach day inviting. Despite the wet environment, it offers a good blend of warm weather and vibrant tropical energy. Compared to August, July is less wet, although the temperature remains stable.

Temperature

Portsmouth's warmest season falls during June through September, averaging a high-temperature of 31°C (87.8°F).

Rainfall

In Portsmouth, in July, it is raining for 20 days, with typically 156mm (6.14") of accumulated precipitation. Throughout the year, there are 214 rainfall days, and 2252mm (88.66") of precipitation is accumulated.

Sea temperature

In Portsmouth, the average seawater temperature in July is 28.7°C (83.7°F).
Note: For engaging in any water activities, temperatures from 25°C (77°F) to 29°C (84.2°F) are viewed as outstanding and exceptionally pleasing for prolonged durations.

Daylight

In Portsmouth, the average length of the day in July is 12h and 57min.
On the first day of the month, sunrise is at 05:38 and sunset at 18:40. On the last day of July, sunrise is at 05:47 and sunset at 18:36 AST.

Sunshine

March through August, with an average of 8h of sunshine, are months with the most sunshine in Portsmouth.

UV index

March through September, with an average maximum UV index of 12, are months with the highest UV index in Portsmouth. A UV Index value of 11, and more, symbolizes an extreme threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: The UV index of 12 in July translates into these instructions:
Adopt all important safety measures, unprotected skin may burn rapidly. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. Stay sun-safe with clothing that is both closely woven and worn loosely. Use liberally and reapply a broad-spectrum SPF 30+ sunscreen every two hours, or straight away after any outdoor workout or swim. Be cautious! Sand and water surfaces make the Sun's UV rays more potent.
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Frequently asked questions

What is the warmest month in Portsmouth?

Portsmouth witnesses its highest temperatures in June through September, reaching an average of 31°C (87.8°F).

How hot is July in Portsmouth?

The high-temperature in Portsmouth during July is 31°C (87.8°F) and the low-temperature is 24°C (75.2°F).

How much does it rain in Portsmouth in July?

In July, in Portsmouth, Dominica, the rain falls for 20 days. Throughout July, 156mm (6.14") of precipitation is accumulated.

What is the water temperature in July in Portsmouth?

In July, the average sea temperature is 28.7°C (83.7°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 average length of the day in July in Portsmouth?

The average day length in July in Portsmouth, Dominica, is 12h and 57min.

When are sunrise and sunset in July in Portsmouth?

In July, on the first day of the month, sunrise is at 05:38 and sunset at 18:40. On the last day of the month, sunrise is at 05:47 and sunset at 18:36 AST.

What is the month with the most sunshine in Portsmouth?

The months with the most sunshine in Portsmouth, Dominica, are March through August, with an average of 8h of sunshine.

How long on average sun shines in July in Portsmouth?

In July, the average sunshine duration in Portsmouth is 8h.

What are the months with the highest UV index in Portsmouth?

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

What is the UV index intensity in July in Portsmouth?

In Portsmouth, Dominica, the average daily maximum UV index in July is 12. A UV Index estimate of 11, and higher, represents an excessive health risk from exposure to Sun's UV rays.
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in July
Portsmouth, Dominica

Average temperature in July - Portsmouth, Dominica
  • Average high temperature in July: 31°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 July: 24°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).

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Average rainfall in July
Portsmouth, Dominica

Average rainfall in July - Portsmouth, Dominica
  • Average rainfall in July: 156mm

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 in July
Portsmouth, Dominica

Average rainfall days in July - Portsmouth, Dominica
  • Average rainfall days in July: 20 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).

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Average sea temperature in July
Portsmouth, Dominica

Average sea temperature in July - Portsmouth, Dominica
  • Average sea temperature in July: 28.7°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).

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

Average daylight in July / Average sunshine in July - Portsmouth, Dominica
  • Average daylight in July: 12h and 5min

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 July: 8h

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).

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Average UV index in July
Portsmouth, Dominica

Average UV index in July - Portsmouth, Dominica
  • Average UV index in July: 12

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).

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Portsmouth, Dominica

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