Pollen Count & Forecast for Louisville
About Pollen in Louisville
Louisville’s spring (March-May) is dominated by Oak (Quercus) and Maple (Acer); Oak is prolific in Cherokee Park; Maple is widespread in Iroquois Park. Cedar (Juniperus) contributes significantly from suburban residential canopies. Summer (May-July) sees high Grass (Poaceae) levels, originating from the Parklands of Floyds Fork. Autumn (August-October) has high Ragweed (Ambrosia) counts near the Ohio River floodplains and fallow fields.
The city sits in the Ohio River Valley; this bowl-like geography traps allergens near the ground. High humidity supports Mould (Alternaria, Cladosporium) growth; spores come from decaying leaf litter in Jefferson Memorial Forest and damp urban environments.
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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