What will the weather be like in London in August?

August is the United Kingdom’s hottest month, with average temperatures starting at 18 degrees Celsius, but can be as high as 28 to 32 degrees Celsius in London, and is mainly dry with little rainfall usually. However, the weather in the UK can still be unpredictable, and it is recommended that you pack for some rain still for travel to and from ExCeL London. The majority of YMCA175’s programme will take place inside, with some activities outside.