Weather Alerts For Thomson, IL

Pollen Index: 8.2 Pollen Level: medium-high Predominant Pollen: Elm, Maple and Poplar/Aspen/Cottonwood. Concentration of pollen grains in the air for Friday will be falling in the low range. This relief in pollen levels is caused in part by falling temperatures, rising humidity and heavy rains in the morning which tend to wash pollen out of the air. That's good news for allergy sufferers.