Pollen Count & Forecast for New Orleans

New Orleans’ spring allergy season (February-May) is dominated by Live Oak and Cypress; Live Oak (Quercus virginiana) heavy in City Park and Audubon Park; Bald Cypress (Taxodium distichum) dense along Bayou St. John. Pecan (Carya illinoinensis) contributes significantly from residential areas. Summer and autumn (August-October) see high Ragweed (Ambrosia) pollen levels, originating from the Mississippi River banks and Bermuda Grass (Cynodon dactylon) in public squares.

Bowl-shaped topography and high humidity trap pollen, leading to localized high concentrations. Autumn and winter see elevated Mould (Alternaria, Cladosporium) spore counts, from decomposing organic matter in surrounding wetlands and damp French Quarter environments.