London weather

Our guide to the weather in London during May

17

Average high

4

UV Index

66mm

Monthly rainfall

74%

Humidity

We've looked at the most up-to-date weather data for London, covering the last 12 years up to 2026, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about London weather in May.

What's the temperature like in London during May?

The temperature reaches around 17℃ during the daytime in May, falling away to 9℃ at night. The UV index will be moderate at this time of year, so not something to worry about for the average person. However, if you're going to be outside for long periods it's worth wearing a broad spectrum SPF 30+ sunscreen and UV-blocking sunglasses. Remember that bright surfaces, such as water and sand increase UV exposure.

Does it rain in London during May?

On average, there will be 5 rainy days during the month, amounting to 66.0mm in total. That's broadly comparable with the amount of rain we see in England during the summer months, and would be considered dry. There's a small chance that you'll catch a thunderstorm during your trip.

Is it windy in London during May?

You're unlikely to experience any strong winds. Expect a gentle breeze that increases to moderate at times during May. With moderate air temperatures, any breeze will feel cool.

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London Blog posts

From the UK's most popular travel bloggers

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8 Very Best London Walks for Tourists (and Locals): From Landmarks to Hidden Gems

27th January 2026 by Hand Luggage Only

London is a remarkable city, brimming with history, culture, and vibrant neighbourhoods. Whether you're a tourist or a local, there's always something new to discover. From iconic landmarks to charming hidden gems, the capital offers a variety of walks that showcase its unique character. In this post, we’ll explore eight of the best walks in London, perfect for anyone looking to experience the city from a fresh perspective....

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Planning a Family Weekend in London, but Unsure Where to Start?

9th September 2025 by Pack the PJs

If you're planning a family weekend in London but feeling a bit overwhelmed, you're not alone. This itinerary is designed specifically for young families, ensuring you can enjoy the best of what the city has to offer without the stress. Get ready to make the most of your time in this vibrant metropolis!...

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Americans' First Time in London - What Did They Really Think? (Rain, Big Ben & the Pub)

3rd June 2025 by Fly Drive Explore

In this video, our American friends embark on their first adventure in London, exploring the city's iconic sights and sharing their genuine impressions along the way. Starting in Bloomsbury, they make their way to Covent Garden and stroll along the picturesque Embankment by the River Thames. Of course, no trip would be complete without a visit to Big Ben—though we all know it's the bell that bears the name! Join us as we take in the must-see attractions of central London and discover what...

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11 Top Things to Do in Greenwich, London

24th March 2025 by Emily Luxton

Greenwich, London, is a treasure trove of history and culture, offering a delightful mix of stunning architecture and famous landmarks. Whether you're wandering through its charming streets or exploring its rich maritime heritage, there’s no shortage of attractions to discover. Here are eleven must-see highlights that make Greenwich a fantastic destination for your next escape....

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3rd March 2025 by Globalmouse Travels

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This week's successes: 22nd December 2024

22nd December 2024 by Stuart

A short and sweet update this week with 3 new winners... New winners Jacquelyn won the Crew Clothing Women’s Six Nations competition: “Thank you for posting the competition to win tickets to Twickenham to watch women’s England rugby team v France and £400 of Crew Clothing. I have won!! Can’t wait to see them win in April and model my new clothes xx” Jacquelyn’s full prize is 4 tickets the England v France home game at Twickenham for the 2025 Guinness Women’s Six...

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This week's successes: 15th December 2024

15th December 2024 by Stuart

There are 2 wins and a prize update to tell you about this week... New winners Meryl won a competition with Cunard and has already enjoyed her prize: “I have just won a fantastic competition where I received tickets to the King’s Trust Carol Concert at St Paul’s Church, Knightsbridge and to stay at the (5-star) The Londoner hotel in Leicester Square… We had a great time!” Rebecca was the lucky winner of Visit Bristol’s “Ultimate Festive Break”. It has to be taken...

Weather in London

Our month-by-month guide to the weather and climate in London

7.0

London weather in

January
8.0

London weather in

February
11.0

London weather in

March
14.4

London weather in

April
17.1

London weather in

May
20.5

London weather in

June
22.9

London weather in

July
22.6

London weather in

August
19.9

London weather in

September
15.5

London weather in

October
10.9

London weather in

November
7.9

London weather in

December