Factors like rain, wind, temperature and sunshine can all affect how much pollen will be produced and dispersed, making each annual pollen forecast different to the one before.
UK weather: 'Pollen bomb' to explode over country causing hay fever misery somersetlive.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from somersetlive.co.uk Daily Mail and Mail on Sunday newspapers.
Snow and ice could return to UK next week following 'unsettled' weekend nottinghampost.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from nottinghampost.com Daily Mail and Mail on Sunday newspapers.