Pollen Forecast for Knoxville, Iowa

The quantity of pollen grains in the air for Wednesday will be increasing over today's levels but will remain in the extremely low range. This is likely to be caused in part by seasonally normal weather conditions which are favorable for the production and dispersal of pollen.

The quantity of pollen grains in the air for Thursday will be falling and will remain in the extremely low range. This relief in pollen levels is caused in part by rising humidity, weak winds and expected precipitation in the evening which tends to wash pollen out of the air.