Weather Alerts For Castleton, IL

Pollen Index: 10.6 Pollen Level: high Predominant Pollen: Maple, Alder and Cedar/Juniper. Based on past pollen counts and expected weather conditions, pollen levels for Monday will be falling in the moderate range. The cause for the falling pollen levels is rising humidity and heavy rains in the afternoon and evening which tend to wash pollen out of the air. This reduction in pollen levels should be a relief to allergy sufferers.