London Set for Heatwave This Weekend as Temperatures Expected to Reach 28 Degrees As the mercury soars to unprecedented heights, London is bracing itself for what promises to be its hottest day yet this year.
The forecast predicts a sweltering 28 degrees Celsius on Friday, a stark contrast to the unusually cool May that preceded it.
The Met Office has defined London's heatwave threshold as three consecutive days at or above 28 degrees Celsius.