Pollen Count & Forecast for Minneapolis

Minneapolis’s spring allergy season (April-June) is dominated by Oak and Maple pollen; Oak (Quercus) prolific around the Chain of Lakes; Maple (Acer) widespread throughout Loring Park. Ash (Fraxinus) contributes to counts from city boulevards. Summer (June-August) sees high Grass (Poaceae) pollen levels, originating from Boom Island Park and along Mississippi River riverbanks. Late summer brings Common Ragweed (Ambrosia artemisiifolia) from Theodore Wirth Regional Park and surrounding prairies.

Flat terrain and the river valley allow pollen to travel across the city. Autumn and winter see elevated Mould (Alternaria, Cladosporium) spore counts, from decomposing leaf litter in Minnehaha Regional Park and damp lakeside environments.