Pollen Count & Forecast for Hounslow

Hounslow’s primary spring allergens, Birch and Oak pollen, peak from March to May, originating significantly from mature trees within Lampton Park, Boston Manor Park, and Gunnersbury Park; summer sees high grass pollen counts from late May through July, with abundant sources along River Crane meadows and managed municipal parklands. The urban-green interface, notably around Gunnersbury Park, creates sheltered conditions that can locally concentrate airborne pollen, intensifying exposure. Autumn brings elevated mould spore levels from October to November, driven by damp leaf decomposition in wooded areas and along the Grand Union Canal banks.