Pollen Count & Forecast for Chelmsford, Chelmsford

Chelmsford’s spring allergy profile, late March to May, features peak Birch and Oak pollen, largely sourced from Central Park and Admirals Park arboreal zones; summer, June to August, sees high grass pollen from River Chelmer and River Can floodplains and surrounding meadows. The city’s basin topography, particularly near Hylands Park, can create pollen trapping effects, intensifying localised allergen exposure; late autumn, September through November, experiences elevated mould spore levels, primarily from damp leaf decomposition in urban woodlands and riparian zones.