Weather In London In May 2025. Discover the most accurate weather forecast for london in may 2025. On the coldest nights, which normally.

The average temperature is of 13.8 °c (57 °f), with a minimum of 9.1 °c (48.4 °f) and a maximum of 18.5 °c (65.3 °f). Discover the most accurate weather forecast for london in may 2025.