UV Index Today in St. Louis County, Missouri (MO) Wednesday, July 15, 2026 -12:03 PM CDT (GMT-5) The average maximum UV Index today across 122 locations in St. Louis County, Missouri (MO) , is 9.9. The highest projected maximum is 10 in St. Louis at 1:00 PM CDT, while the lowest projected maximum is 9.3 in St. Charles at 12:00 PM CDT.
Tomorrow, the average maximum UV Index across those same locations is expected to be 9.6. The highest projected maximum is 10 in Meramec at 1:00 PM CDT, and the lowest projected maximum is 9.3 in St. Louis at 12:00 PM CDT.
28 County Subdivisions in St. Louis County, Missouri (MO) Maximum UV Index Today
Airport - 10
Bonhomme - 9.8
Chesterfield - 9.8
Clayton - 10
Concord - 10
Creve Coeur - 9.3
Ferguson - 10
Florissant - 10
Gravois - 10
Hadley - 10
Jefferson - 10
Lafayette - 9.8
Lemay - 10
Lewis and Clark - 10
Maryland Heights - 9.3
Meramec - 9.8
Midland - 10
Missouri River - 9.8
Normandy - 10
Northwest - 9.3
Norwood - 10
Oakville - 10
Queeny - 9.8
St. Ferdinand - 10
Spanish Lake - 10
Tesson Ferry - 9.8
University - 10
Wildhorse - 9.894 Places in St. Louis County, Missouri (MO) Maximum UV Index Today
Affton - 10
Ballwin - 9.8
Bella Villa - 10
Bellefontaine Neighbors - 10
Bel-Nor - 10
Bel-Ridge - 10
Berkeley - 10
Black Jack - 10
Breckenridge Hills - 10
Brentwood - 10
Bridgeton - 9.3
Calverton Park - 10
Castle Point - 10
Charlack - 10
Chesterfield - 9.3
Clarkson Valley - 9.3
Clayton - 10
Concord - 10
Cool Valley - 10
Country Club Hills - 10
Crestwood - 9.8
Creve Coeur - 9.3
Crystal Lake Park - 9.8
Dellwood - 10
Des Peres - 9.8
Edmundson - 10
Ellisville - 9.8
Eureka - 9.8
Fenton - 9.8
Ferguson - 10
Flordell Hills - 10
Florissant - 10
Frontenac - 9.3
Glasgow Village - 10
Glendale - 9.8
Grantwood Village - 10
Greendale - 10
Green Park - 10
Hanley Hills - 10
Hazelwood - 9.3
Hillsdale - 10
Jennings - 10
Kirkwood - 9.8
LaBarque Creek - 9.8
Ladue - 9.3
Lakeshire - 10
Lemay - 10
Manchester - 9.8
Maplewood - 10
Marlborough - 10
Maryland Heights - 9.3
Mehlville - 10
Moline Acres - 10
Murphy - 9.8
Normandy - 10
Northwoods - 10
Norwood Court - 10
Oakland - 9.8
Oakville - 10
Old Jamestown - 10
Olivette - 9.3
Overland - 10
Pacific - 9.8
Pagedale - 10
Pasadena Hills - 10
Pasadena Park - 10
Pine Lawn - 10
Richmond Heights - 10
Riverview - 10
Rock Hill - 10
St. Ann - 9.3
St. Charles - 9.3
St. George - 10
St. John - 10
St. Louis - 10
Sappington - 10
Shrewsbury - 10
Spanish Lake - 10
Sunset Hills - 9.8
Sycamore Hills - 10
Town and Country - 9.3
Twin Oaks - 9.8
University City - 10
Valley Park - 9.8
Velda City - 10
Velda Village Hills - 10
Vinita Park - 10
Warson Woods - 9.8
Webster Groves - 10
Weldon Spring - 9.3
Wellston - 10
Wildwood - 9.8
Winchester - 9.8
Woodson Terrace - 10