UV Index Today in Lake County, Illinois (IL)

The average maximum UV Index today across 86 locations in Lake County, Illinois (IL), is 4.9. The highest projected maximum is 5 in Arlington Heights at 1:00 PM CDT, while the lowest projected maximum is 4.7 in Zion at 1:00 PM CDT.

Tomorrow, the average maximum UV Index across those same locations is expected to be 4.1. The highest projected maximum is 4.4 in Waukegan at 1:00 PM CDT, and the lowest projected maximum is 3.9 in Zion at 12:00 PM CDT.