August weather forecast
London, United Kingdom

The large Thames river overlooking the Westminster Palace and the Big Ben clock tower in London, United Kingdom
The large Thames river overlooking the Westminster Palace and the Big Ben clock tower in London, United Kingdom

Weather in August

The last month of the summer, August, is another pleasant month in London, United Kingdom, with an average temperature varying between 13.8°C (56.8°F) and 21.9°C (71.4°F).

Temperature

In August, the average high-temperature is essentially the same as in July - a still pleasant 21.9°C (71.4°F). The average low-temperature, in London, is 13.8°C (56.8°F).

Humidity

The least humid month in London is August, with an average relative humidity of 72%.

Rainfall

In London, United Kingdom, in August, it is raining for 13.5 days, with typically 38mm (1.5") of accumulated precipitation. Throughout the year, there are 151.7 rainfall days, and 370mm (14.57") of precipitation is accumulated.

Snowfall

In London, snow does not fall in May through October.

Daylight

The average length of the day in August in London is 14h and 33min.
On the first day of the month, sunrise is at 5:24 am and sunset at 8:49 pm. On the last day of August, in London, sunrise is at 6:11 am and sunset at 7:49 pm BST.

Sunshine

With an average of 7.9h of sunshine, August has the most sunshine of the year.

UV index

The average daily maximum UV index in August in London is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.
Note: The average daily UV index of 4 in August transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.
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FAQ

What is the temperature in August in London?

In London, United Kingdom, in August, the average high-temperature is 21.9°C (71.4°F), and the average low-temperature is 13.8°C (56.8°F).

What is the least humid month in London?

The least humid month is August, with an average relative humidity of 72%.

What is the average humidity in August in London?

The average relative humidity in August in London is 72%.

How much does it rain in London in August?

In London, United Kingdom, during August, the rain falls for 13.5 days and regularly aggregates up to 38mm (1.5") of precipitation.

When it does not snow in London?

In London, snow does not fall in May through October.

What is the average length of the day in August in London?

In August, the average day length in London is 14h and 33min.

When are sunrise and sunset in August in London?

On the first day of August in London, sunrise is at 5:24 am and sunset at 8:49 pm. On the last day of the month, sunrise is at 6:11 am and sunset at 7:49 pm BST.

What month has the most sunshine in London?

August has the most sunshine of the year in London, with an average of 7.9h of sunshine.

How many hours of sunshine does London have in August?

The average sunshine duration in August in London, United Kingdom, is 7.9h.

What is the UV index intensity in August in London?

The average daily maximum UV index in August in London is 4. A UV Index reading of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
London, United Kingdom

Average temperature in August - London, United Kingdom
  • Average high temperature in August: 21.9°C

The warmest month (with the highest average high temperature) is July (22.3°C).
The month with the lowest average high temperature is January (6.8°C).

  • Average low temperature in August: 13.8°C

The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is January (2.2°C).

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Average pressure in August
London, United Kingdom

Average pressure in August - London, United Kingdom
  • Average pressure in August: 1014.9mbar

The month with the highest atmospheric pressure is September (1016.9mbar).
The month with the lowest atmospheric pressure is November (1010.6mbar).

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Average wind speed in August
London, United Kingdom

Average wind speed in August - London, United Kingdom
  • Average wind speed in August: 12.8km/h

The windiest month (with the highest average wind speed) is February (17.3km/h).
The calmest month (with the lowest average wind speed) is September (12.6km/h).

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Average humidity in August
London, United Kingdom

Average humidity in August - London, United Kingdom
  • Average humidity in August: 72%

The month with the highest relative humidity is December (88%).
The month with the lowest relative humidity is August (72%).

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Average rainfall in August
London, United Kingdom

Average rainfall in August - London, United Kingdom
  • Average rainfall in August: 38mm

The wettest month (with the highest rainfall) is June (45mm).
The driest month (with the least rainfall) is April (22mm).

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Average rainfall days in August
London, United Kingdom

Average rainfall days in August - London, United Kingdom
  • Average rainfall days in August: 13.5 days

The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is September (9.8 days).

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Average snowfall in August
London, United Kingdom

Average snowfall in August - London, United Kingdom
  • Average snowfall in August: 0mm

The month with the highest snowfall is February (16mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).

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Average snowfall days in August
London, United Kingdom

Average snowfall days in August - London, United Kingdom
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in August /
Average sunshine in August
London, United Kingdom

Average daylight in August / Average sunshine in August - London, United Kingdom
  • Average daylight in August: 14h and 33min

The month with the longest days is June (Average daylight: 16h and 34min).
The month with the shortest days is December (Average daylight: 7h and 56min).

  • Average sunshine in August: 7h and 54min

The month with the most sunshine is August (Average sunshine: 7h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).

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Average sunshine days in August
London, United Kingdom

Average sunshine days in August - London, United Kingdom
  • Average sunshine days in August: 15.5 days

The month with the most sunshine days is September (18.1 days).
The month with the least sunshine days is June (12.2 days).

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Average UV index in August
London, United Kingdom

Average UV index in August - London, United Kingdom
  • Average UV index in August: 4

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

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Average cloud cover in August
London, United Kingdom

Average cloud cover in August - London, United Kingdom
  • Average cloud cover in August: 50

The month with the most cloud cover is February (Cloud cover 61).
The month with the least cloud cover is September (Cloud cover 49).

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Average visibility in August
London, United Kingdom

Average visibility in August - London, United Kingdom
  • Average visibility in August: 9km

The months with the highest visibility are January, February, March, April, May, June, July, August, October and December (9km).
The months with the lowest visibility are September and November (8km).

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