Europe London Marathon weather forecast spells good news for runners as three give predictions for April 21 The forecasters generally agree though some predict a gloomier day than others My London – WeatherRead More About Author See author's posts Post navigation Previous Watching This…Next How Deep Was Death Valley’s Temporary Lake? Related Stories London weather forecast predicts one perfect day this week All Regions Europe London weather forecast predicts one perfect day this week April 13, 2026 Why hay fever feels so much worse in London according to allergy expert All Regions Europe Why hay fever feels so much worse in London according to allergy expert April 11, 2026 ‘Very high pollen’ warning from Met Office after hottest day of the year All Regions Europe ‘Very high pollen’ warning from Met Office after hottest day of the year April 8, 2026