UV Index Today in St. Charles County, Missouri (MO)

The average maximum UV Index today across 35 locations in St. Charles County, Missouri (MO), is 6.8. The highest projected maximum is 7 in Florissant at 1:00 PM CDT, while the lowest projected maximum is 6.3 in Foristell at 12:00 PM CDT.

Tomorrow, the average maximum UV Index across those same locations is expected to be 3.9. The highest projected maximum is 6 in Foristell at 2:00 PM CDT, and the lowest projected maximum is 2.3 in Florissant at 1:00 PM CDT.