Pollen Count & Forecast for Indianapolis
About Pollen in Indianapolis
Indianapolis’ spring allergy season (March-May) is dominated by Maple and Oak pollen; Maple (Acer) prolific in Eagle Creek Park and Holliday Park; Oak (Quercus) widespread along White River banks. American Elm (Ulmus americana) contributes significantly from Fort Harrison State Park. Summer and autumn (June-October) see high Kentucky Bluegrass (Poa pratensis) and Giant Ragweed (Ambrosia trifida) levels, originating from Monon Trail and regional farmland.
Flat terrain and urban heat effects trap pollen; prevailing winds transport allergens from surrounding counties. Autumn and winter see elevated Mould (Alternaria, Cladosporium) spore counts, from decaying leaf litter in Marott Park and damp environments near Central Canal.
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What Pollen Levels Mean
LOW
Symptoms are unlikely
MED
Moderate risk of symptoms
HIGH
Widespread symptoms likely
V.HI
Expect significant symptoms
X.HI
Extremely high symptom likelihood & severity