Pollen Count & Forecast for Columbus

Columbus’s spring allergy season (March-May) is dominated by Maple and Oak pollen; Maple (Acer) common along the Olentangy River; Oak (Quercus) widespread in Franklin Park and Highbanks Metro Park. Birch (Betula) and Ash (Fraxinus) contribute from Whetstone Park. Summer (May-July) sees high Grass (Poaceae) levels, originating from suburban lawns and metro parks. Autumn (August-October) has high Ragweed (Ambrosia) counts from rural fields.

The flat till plains and river valleys trap pollen during periods of stagnant air. Autumn and winter see elevated Mould (Alternaria, Cladosporium) spore levels, from decomposing leaf litter in the Clintonville ravines and damp areas near the Scioto River.