All Regions Europe Pollen count for London today as hayfever season officially starts Tree pollen is prevalent from around now until mid-May My London – WeatherRead More About Author OTW Observer See author's posts Post navigation Previous An Asteroid’s Bite in an Australian Mountain RangeNext Exactly how long London’s warm weather will last as today set to be hottest day of 2025 so far Related Stories BBC Weather forecasts when exactly sunny weather will end – sooner than you think All Regions Europe BBC Weather forecasts when exactly sunny weather will end – sooner than you think March 29, 2026 Exact date thunderstorms will roll over London amid 5-day rain forecast All Regions Europe Exact date thunderstorms will roll over London amid 5-day rain forecast March 28, 2026 BBC forecasts four days of straight rain at start of April All Regions Europe BBC forecasts four days of straight rain at start of April March 26, 2026