London
United Kingdom
Long-term weather forecast
Long-term weather forecast
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May weather forecast and Climate
London, United Kingdom

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The large Thames river in London overlooking the Westminster Palace and the Big Ben clock tower in London, United Kingdom, on a cloudy evening after sunset
The large Thames river in London overlooking the Westminster Palace and the Big Ben clock tower in London, United Kingdom, on a cloudy evening after sunset
May is the beginning of the best weather conditions in London as the average temperatures warm up to register in the 47°F (8.3°C) to 64°F (17.8°C) range.
The long 16-hour days bring cheer to the vacation crowds as the sun meets them for a daily 6.4 hours. The blooming buds of early spring turn into blossoming flowers and spread a fragrant aroma in the atmosphere, especially in the suburban landscape. May is the wettest month of the spring season and registers around 1.9" (48.3mm) of rain.
The weather is perfect for exploring the Thames River through the endless available options of cruises, boats, and tours.
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  • The average high temperature in May: 17.9°C

The warmest month (with the highest average high temperature) is July (23.5°C).
The month with the lowest average high temperature is January (8.1°C).

  • The average low temperature in May: 8.7°C

The month with the highest average low temperature is July (13.9°C).
The coldest month (with the lowest average low temperature) is February (2.1°C).

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  • The average rainfall in May: 49.4mm

The wettest month (with the highest rainfall) is October (68.5mm).
The driest month (with the lowest rainfall) is February (40.9mm).

  • The average rainfall days in May: 8.8 days

The month with the highest number of rainy days is January (11.1 days).
The month with the lowest number of rainy days is August (7.5 days).

  • The average daylight in May: 16h

The month with the longest days is June (Average daylight: 17h).
Months with shortest days are January and December (Average daylight: 8h).

  • The average sunshine in May: 6.4h

Months with most sunshine are June and July (Average sunshine: 6.8h).
The month with least sunshine is December (Average sunshine: 1.7h).

  • The average UV index in May: 5

Months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 0).

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