Pollen Count & Forecast for Hillingdon, Buckinghamshire
About Pollen in Hillingdon
Hillingdon’s spring allergy profile is dominated by Birch (March-April) from mature park trees like those in Ruislip Woods; Oak pollen follows (April-May) across borough green spaces. Summer features ubiquitous Grass pollen (May-July), originating from extensive local meadows, sports fields, and the River Colne/Grand Union Canal banks.
The borough’s urban-fringe geography and sheltered residential areas can locally elevate pollen concentrations; dry, windy conditions enhance airborne dispersal. Autumn-winter sees Mould spore prevalence, linked to damp leaf litter and decomposing vegetation in wooded areas.
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Grass
Tree
Weed
What Pollen Levels Mean
LOW
Symptoms are unlikely
MEDIUM
Moderate risk of symptoms
HIGH
Widespread symptoms likely
VERY HIGH
Expect significant symptoms
EXTREME
Extremely high symptom likelihood & severity