Portsmouth
United Kingdom
Long-term weather forecast
Long-term weather forecast

July weather forecast and climate
Portsmouth, United Kingdom

July in Portsmouth, United Kingdom, is a pleasant summer month, with average temperature fluctuating between 21.4°C (70.5°F) and 14.2°C (57.6°F).

Temperature

July and August, with an average high-temperature of 21.4°C (70.5°F), are the warmest months.

Rainfall

In July, the rain falls for 5.4 days. Throughout July, 44.5mm (1.8") of precipitation is accumulated. Throughout the year, there are 103.4 rainfall days, and 699mm (27.5") of precipitation is accumulated.

Sea temperature

In July, the average sea temperature is 15.3°C (59.5°F).
Note: For swimming, a surface water temperature of 15.3°C (59.5°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

Daylight

In July, the average length of the day in Portsmouth is 16h.

Sunshine

The month with the most sunshine in Portsmouth is July, with an average of 8.4h of sunshine.

UV index

Months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to the UV radiation for the ordinary person.
Note: The daily maximum UV index of 6 interpret into the following advice:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What are the warmest months in Portsmouth?

Warmest months in Portsmouth, United Kingdom, are July and August, with an average high-temperature of 21.4°C (70.5°F).

What is the temperature in July in Portsmouth?

In Portsmouth, in July, the average high-temperature is 21.4°C (70.5°F), and the average low-temperature is 14.2°C (57.6°F).

How many days does it rain in July in Portsmouth?

In Portsmouth, in July, it is raining for 5.4 days, with typically 44.5mm (1.8") of accumulated precipitation.

What is the sea temperature in July in Portsmouth?

In Portsmouth, United Kingdom, in July, the average water temperature is 15.3°C (59.5°F). For swimming, a surface water temperature of 15.3°C (59.5°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

How many hours of daylight does Portsmouth have in July?

The average length of the day in July in Portsmouth, United Kingdom, is 16h.

What month has the most sunshine in Portsmouth?

The month with the most sunshine is July, with an average of 8.4h of sunshine.

How many hours of sunshine does Portsmouth have in July?

In Portsmouth, United Kingdom, the average sunshine in July is 8.4h.

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

Months with the highest UV index are May through August, with an average maximum UV index of 6.

What is the UV index intensity in July in Portsmouth?

In July, the average daily maximum UV index in Portsmouth, United Kingdom, is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from the exposure to the Sun's UV radiation.
Average temperature in July - Portsmouth, United Kingdom
  • Average high temperature in July: 21.4°C

Warmest months (with the highest average high temperature) are July and August (21.4°C).
Months with the lowest average high temperature are January and February (8.2°C).

  • Average low temperature in July: 14.2°C

The month with the highest average low temperature is August (14.3°C).
The coldest month (with the lowest average low temperature) is February (2.8°C).

Average rainfall in July - Portsmouth, United Kingdom
  • Average rainfall in July: 44.5mm

The wettest month (with the highest rainfall) is October (86.2mm).
The driest month (with the lowest rainfall) is June (42mm).

Average rainfall days in July - Portsmouth, United Kingdom
  • Average rainfall days in July: 5.4 days

Months with the highest number of rainy days are January and December (11.2 days).
The month with the lowest number of rainy days is July (5.4 days).

Average sea temperature in July - Portsmouth, United Kingdom
  • Average sea temperature in July: 15.3°C

The best month for swimming (with the highest average sea temperature) is September (17.3°C).
The coldest month (with the lowest average sea temperature) is March (8.6°C).

Average daylight in July / Average sunshine in July - Portsmouth, United Kingdom
  • Average daylight in July: 16h

The month with the longest days is June (Average daylight: 16.4h).
The month with shortest days is December (Average daylight: 8h).

  • Average sunshine in July: 8.4h

The month with most sunshine is July (Average sunshine: 8.4h).
The month with least sunshine is December (Average sunshine: 2h).

Average UV index in July - Portsmouth, United Kingdom
  • Average UV index in July: 6

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 1).