UV Index Today in Jefferson County, Missouri (MO)

The average maximum UV Index today across 35 locations in Jefferson County, Missouri (MO), is 7.1. The highest projected maximum is 7.3 in Valle at 1:00 PM CDT, while the lowest projected maximum is 6.9 in Rock at 1:00 PM CDT.

Tomorrow, the average maximum UV Index across those same locations is expected to be 3.5. The highest projected maximum is 4.5 in Valle at 3:00 PM CDT, and the lowest projected maximum is 3.1 in Imperial at 1:00 PM CDT.