May weather forecast
London, United Kingdom

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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 May

May in London offers the first taste of summer, with warmer temperatures and blooming city parks. Its longer daylight hours promise sunnier days, presenting a marked difference from the relatively rainier April. The weather continues to brighten into June, making May one of the most popular months for outdoor activities. It's a month typically free of any snowfall, indicating a definitive end to winter. May records the highest average atmospheric pressure value of 1016.8mb throughout the year.

Temperature

May in London experiences an average high-temperature of an enjoyable 16.8°C (62.2°F), barely different from April's 14.3°C (57.7°F). May in London witnesses an average low-temperature hovering around a frosty 8.3°C (46.9°F).

Humidity

In London, the average relative humidity in May is 75%.

Rainfall

In London, during May, the rain falls for 14.3 days and regularly aggregates up to 26mm (1.02") of 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

In London, the average length of the day in May is 15h and 38min.
On the first day of the month, sunrise is at 5:30 am and sunset at 8:24 pm. On the last day of May, sunrise is at 4:49 am and sunset at 9:07 pm BST.

Sunshine

The average sunshine in May in London is 7.4h.

UV index

The average daily maximum UV index in May is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum daily UV index of 4 in May interprets into the following recommendations:
Be vigilant - A duty to shield skin and eyes from injury exists. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Updated: Feb 8, 2024 | Published by: Weather Atlas | About Us

Frequently asked questions

What is the temperature in May in London?

In May, the average high-temperature and low-temperature in London, United Kingdom, are 16.8°C (62.2°F) and 8.3°C (46.9°F) respectively.

What is the average humidity in May in London?

In London, the average relative humidity in May is 75%.

How many days does it rain in May in London?

In May, in London, the rain falls for 14.3 days. Throughout May, 26mm (1.02") of precipitation is accumulated.

When it does not snow in London?

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

Does it snow in London in May?

In May, in London, United Kingdom, it doesn't snow. April is the latest month when it typically snows.

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

In May, the average day length in London, United Kingdom, is 15h and 38min.

When are sunrise and sunset in May in London?

In May, on the first day of the month, sunrise is at 5:30 am and sunset at 8:24 pm. On the last day of the month, in London, United Kingdom, sunrise is at 4:49 am and sunset at 9:07 pm BST.

How long on average sun shines in May in London?

In May, the average sunshine duration in London, United Kingdom, is 7.4h.

How high is the UV index in May in London?

In London, United Kingdom, the average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a medium health risk 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 May
London, United Kingdom

Average temperature in May - London, United Kingdom
  • Average high temperature in May: 16.8°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 May: 8.3°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).

Average pressure in May
London, United Kingdom

Average pressure in May - London, United Kingdom
  • Average pressure in May: 1016.8mbar

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

Average wind speed in May
London, United Kingdom

Average wind speed in May - London, United Kingdom
  • Average wind speed in May: 13.4km/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).

Average humidity in May
London, United Kingdom

Average humidity in May - London, United Kingdom
  • Average humidity in May: 75%

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

Average rainfall in May
London, United Kingdom

Average rainfall in May - London, United Kingdom
  • Average rainfall in May: 26mm

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

Average rainfall days in May
London, United Kingdom

Average rainfall days in May - London, United Kingdom
  • Average rainfall days in May: 14.3 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).

Average snowfall in May
London, United Kingdom

Average snowfall in May - London, United Kingdom
  • Average snowfall in May: 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).

Average snowfall days in May
London, United Kingdom

Average snowfall days in May - London, United Kingdom
  • Average snowfall days in May: 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).

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

Average daylight in May / Average sunshine in May - London, United Kingdom
  • Average daylight in May: 15h and 4min

The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).

  • Average sunshine in May: 7h and 2min

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).

Average sunshine days in May
London, United Kingdom

Average sunshine days in May - London, United Kingdom
  • Average sunshine days in May: 14.1 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).

Average UV index in May
London, United Kingdom

Average UV index in May - London, United Kingdom
  • Average UV index in May: 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).

Average cloud cover in May
London, United Kingdom

Average cloud cover in May - London, United Kingdom
  • Average cloud cover in May: 51

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

Average visibility in May
London, United Kingdom

Average visibility in May - London, United Kingdom
  • Average visibility in May: 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).

London, United Kingdom

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