July weather forecast
Southampton, United Kingdom

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A lovely water fountain in front of the City Art Gallery building in Southampton, United Kingdom
A lovely water fountain in front of the City Art Gallery building in Southampton, United Kingdom

Weather in July

July marks the peak of summer in Southampton, offering the sunniest and warmest days of the year. The distinction of being the hottest month is evident with maximum temperatures soaring up to 20.7°C (69.3°F). The warmth extends to the sea as well, making it suitable for maritime escapades. Long daylight hours paired with significant sunlight intensity paint a vibrantly verdant picture of the city. July, with its inherent summer charm, presents an ideal setting for a spectrum of outdoor activities and events.

Temperature

July, with its high-temperature average of 20.7°C (69.3°F) and a low-temperature average of 13°C (55.4°F), is the warmest month.

Humidity

July and August, with an average relative humidity of 79%, are the least humid months.

Rainfall

In Southampton, United Kingdom, in July, it is raining for 16.8 days, with typically 33mm (1.3") of accumulated precipitation. In Southampton, during the entire year, the rain falls for 184.9 days and collects up to 482mm (18.98") of precipitation.

Snowfall

April through October are months without snowfall in Southampton.

Sea temperature

In Southampton, the average seawater temperature in July is 15.3°C (59.5°F).
Note: For most individuals, swimming in 15.3°C (59.5°F) is not a pleasant experience. The difficulty in managing breathing increases as the temperature decreases from 21°C (69.8°F) to 15°C (59°F).

Daylight

In Southampton, United Kingdom, the average length of the day in July is 16h and 0min.
On the first day of the month, sunrise is at 4:56 am and sunset at 9:22 pm. On the last day of July, in Southampton, sunrise is at 5:31 am and sunset at 8:52 pm BST.

Sunshine

July has the most sunshine of the year in Southampton, with an average of 8.7h of sunshine.

UV index

June and July, with an average maximum UV index of 5, are months with the highest UV index in Southampton. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The UV index of 5 during July translates into the following guidance:
Undertake precautions - Obligation exists to protect against skin and eye damage. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
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Frequently asked questions

What are the warmest months in Southampton?

July registers as the month with the average highest temperatures in Southampton, reaching 20.7°C (69.3°F) at its peak and 13°C (55.4°F) at the lowest.

What are July temperatures in Southampton?

The high-temperature, in July, in Southampton, is 20.7°C (69.3°F), while the low-temperature averages to 13°C (55.4°F).

What is the least humid month in Southampton?

The months with the lowest humidity are July and August, with an average relative humidity of 79%.

What is the average humidity in July in Southampton?

In July, the average relative humidity in Southampton, United Kingdom, is 79%.

How much does it rain in Southampton in July?

In Southampton, United Kingdom, in July, it is raining for 16.8 days, with typically 33mm (1.3") of accumulated precipitation.

When it does not snow in Southampton?

In Southampton, United Kingdom, snow does not fall in April through October.

What is the sea water temperature in July in Southampton?

In July, the average sea temperature in Southampton is 15.3°C (59.5°F). For most, swimming in 15.3°C (59.5°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

What is the average length of the day in July in Southampton?

In Southampton, the average day length in July is 16h and 0min.

When are sunrise and sunset in July in Southampton?

On the first day of July, sunrise is at 4:56 am and sunset at 9:22 pm. On the last day of the month, sunrise is at 5:31 am and sunset at 8:52 pm BST.

What month has the most sunshine in Southampton?

With an average of 8.7h of sunshine, July has the most sunshine of the year in Southampton, United Kingdom.

How many hours of sunshine does Southampton have in July?

In Southampton, United Kingdom, the average sunshine duration in July is 8.7h.

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

The months with the highest UV index are June and July, with an average maximum UV index of 5.

How high is the UV index in July in Southampton?

In Southampton, United Kingdom, the average daily maximum UV index in July is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in July
Southampton, United Kingdom

Average temperature in July - Southampton, United Kingdom
  • Average high temperature in July: 20.7°C

The warmest month (with the highest average high temperature) is July (20.7°C).
The month with the lowest average high temperature is January (7.4°C).

  • Average low temperature in July: 13°C

The month with the highest average low temperature is August (13.3°C).
The coldest months (with the lowest average low temperature) are January and February (3.3°C).

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Average pressure in July
Southampton, United Kingdom

Average pressure in July - Southampton, United Kingdom
  • Average pressure in July: 1015.7mbar

The month with the highest atmospheric pressure is September (1017.2mbar).
The month with the lowest atmospheric pressure is November (1010.7mbar).

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Average wind speed in July
Southampton, United Kingdom

Average wind speed in July - Southampton, United Kingdom
  • Average wind speed in July: 14km/h

The windiest month (with the highest average wind speed) is February (19.3km/h).
The calmest month (with the lowest average wind speed) is July (14km/h).

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Average humidity in July
Southampton, United Kingdom

Average humidity in July - Southampton, United Kingdom
  • Average humidity in July: 79%

The months with the highest relative humidity are January and December (87%).
The months with the lowest relative humidity are July and August (79%).

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Average rainfall in July
Southampton, United Kingdom

Average rainfall in July - Southampton, United Kingdom
  • Average rainfall in July: 33mm

The wettest month (with the highest rainfall) is December (61mm).
The driest month (with the least rainfall) is April (27mm).

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Average rainfall days in July
Southampton, United Kingdom

Average rainfall days in July - Southampton, United Kingdom
  • Average rainfall days in July: 16.8 days

The month with the highest number of rainy days is November (17.5 days).
The month with the least rainy days is September (12.3 days).

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Average snowfall in July
Southampton, United Kingdom

Average snowfall in July - Southampton, United Kingdom
  • Average snowfall in July: 0mm

The month with the highest snowfall is December (8mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).

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Average snowfall days in July
Southampton, United Kingdom

Average snowfall days in July - Southampton, United Kingdom
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (1.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in July
Southampton, United Kingdom

Average sea temperature in July - Southampton, 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).

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Average daylight in July /
Average sunshine in July
Southampton, United Kingdom

Average daylight in July / Average sunshine in July - Southampton, United Kingdom
  • Average daylight in July: 16h and 0min

The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 0min).

  • Average sunshine in July: 8h and 4min

The month with the most sunshine is July (Average sunshine: 8h and 42min).
The month with the least sunshine is February (Average sunshine: 3h and 54min).

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Average sunshine days in July
Southampton, United Kingdom

Average sunshine days in July - Southampton, United Kingdom
  • Average sunshine days in July: 11 days

The month with the most sunshine days is March (14 days).
The month with the least sunshine days is November (8.9 days).

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Average UV index in July
Southampton, United Kingdom

Average UV index in July - Southampton, United Kingdom
  • Average UV index in July: 5

The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February and November (UV index 2).

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Average cloud cover in July
Southampton, United Kingdom

Average cloud cover in July - Southampton, United Kingdom
  • Average cloud cover in July: 45

The month with the most cloud cover is November (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 44).

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Average visibility in July
Southampton, United Kingdom

Average visibility in July - Southampton, United Kingdom
  • Average visibility in July: 9km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).

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Southampton, United Kingdom

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