Weather Alerts For Janesville, IL

Pollen Index: 11.5 Pollen Level: high Predominant Pollen: Poplar/Aspen/Cottonwood, Cedar/Juniper and Elm. Pollen concentrations for Friday will be falling in the moderate range. This lower level is caused by falling temperatures, rising humidity and heavy rains in the afternoon and evening which tend to wash pollen out of the air. The lower pollen levels are significant and should help allergy sufferers to cope tomorrow.