Pollen Count & Forecast for Paris

Paris’s spring allergy season (March-May) is dominated by Birch and Plane pollen; Birch (Betula) prolific in Bois de Boulogne and Parc Monceau; London Plane (Platanus x acerifolia) widespread across boulevards like the Champs-Élysées. Oak (Quercus) contributes significantly from larger Paris parks. Summer (May-July) sees high Grass (Poaceae) pollen levels, originating from Champ de Mars and along River Seine riverbanks.

Dense Haussmann architecture and narrow streets trap pollen, leading to localised high concentrations. Autumn and winter see elevated Mould (Alternaria, Cladosporium) spore counts, from decomposing leaf litter in Jardin des Tuileries and damp city environments.