UV Index Today in Lake County, Illinois (IL)

The average maximum UV Index today across 86 locations in Lake County, Illinois (IL), is 5.5. The highest projected maximum is 5.5 in Waukegan at 1:00 PM CDT, while the lowest projected maximum is 5.4 in Arlington Heights at 1:00 PM CDT.

Tomorrow, the average maximum UV Index across those same locations is expected to be 5.3. The highest projected maximum is 5.7 in Arlington Heights at 1:00 PM CDT, and the lowest projected maximum is 4.9 in Zion at 1:00 PM CDT.