Pollen Forecast for O'Fallon, Illinois

The amount of pollen in the air for Tuesday will be greater than today's levels but will still remain in the low range. This forecast of higher pollen concentration is based on strong winds and decreasing humidity. If you have these allergies, tomorrow will likely be more difficult outdoors.

Concentration of pollen grains in the air for Wednesday will be increasing but will still remain in the low range. This rise is a result of strong winds and decreasing humidity.