Pollen Count & Forecast for Quebec City

Quebec City’s spring (April-June) is dominated by Birch and Maple pollen; Paper Birch (Betula papyrifera) prolific in the Plains of Abraham and Parc de la Chute-Montmorency; Sugar Maple (Acer saccharum) widespread across city streets. Green Ash (Fraxinus pennsylvanica) contributes significantly from Bois-de-Coulonge. Summer (June-August) sees high Grass (Poaceae) levels, originating from the Saint Lawrence River banks; Common Ragweed (Ambrosia artemisiifolia) is found near the Saint-Charles River.

The Cap Diamant cliff and steep elevation changes create wind tunnels that concentrate pollen in Lower Town. Autumn and winter see high Mould (Alternaria, Cladosporium) spore counts; decomposing leaf litter in Battlefields Park and humidity near the Saint Lawrence River are sources.