UV Index Today in St. Louis County, Missouri (MO) Wednesday, November 4, 2026 -11:18 AM CST (GMT-6) The average maximum UV Index today across 122 locations in St. Louis County, Missouri (MO) , is 2.5. The highest projected maximum is 2.7 in Chesterfield at 11:00 AM CST, while the lowest projected maximum is 2.3 in St. Charles at 11:00 AM CST.
Tomorrow, the average maximum UV Index across those same locations is expected to be 3.1. The highest projected maximum is 3.2 in Meramec at 12:00 PM CST, and the lowest projected maximum is 3 in St. Charles at 12:00 PM CST.
28 County Subdivisions in St. Louis County, Missouri (MO) Maximum UV Index Today
Airport - 2.4
Bonhomme - 2.7
Chesterfield - 2.7
Clayton - 2.4
Concord - 2.4
Creve Coeur - 2.3
Ferguson - 2.4
Florissant - 2.4
Gravois - 2.4
Hadley - 2.4
Jefferson - 2.4
Lafayette - 2.7
Lemay - 2.4
Lewis and Clark - 2.4
Maryland Heights - 2.3
Meramec - 2.7
Midland - 2.4
Missouri River - 2.7
Normandy - 2.4
Northwest - 2.3
Norwood - 2.4
Oakville - 2.4
Queeny - 2.7
St. Ferdinand - 2.4
Spanish Lake - 2.4
Tesson Ferry - 2.7
University - 2.4
Wildhorse - 2.794 Places in St. Louis County, Missouri (MO) Maximum UV Index Today
Affton - 2.4
Ballwin - 2.7
Bella Villa - 2.4
Bellefontaine Neighbors - 2.4
Bel-Nor - 2.4
Bel-Ridge - 2.4
Berkeley - 2.4
Black Jack - 2.4
Breckenridge Hills - 2.4
Brentwood - 2.4
Bridgeton - 2.3
Calverton Park - 2.4
Castle Point - 2.4
Charlack - 2.4
Chesterfield - 2.3
Clarkson Valley - 2.3
Clayton - 2.4
Concord - 2.4
Cool Valley - 2.4
Country Club Hills - 2.4
Crestwood - 2.7
Creve Coeur - 2.3
Crystal Lake Park - 2.7
Dellwood - 2.4
Des Peres - 2.7
Edmundson - 2.4
Ellisville - 2.7
Eureka - 2.7
Fenton - 2.7
Ferguson - 2.4
Flordell Hills - 2.4
Florissant - 2.4
Frontenac - 2.3
Glasgow Village - 2.4
Glendale - 2.7
Grantwood Village - 2.4
Greendale - 2.4
Green Park - 2.4
Hanley Hills - 2.4
Hazelwood - 2.3
Hillsdale - 2.4
Jennings - 2.4
Kirkwood - 2.7
LaBarque Creek - 2.7
Ladue - 2.3
Lakeshire - 2.4
Lemay - 2.4
Manchester - 2.7
Maplewood - 2.4
Marlborough - 2.4
Maryland Heights - 2.3
Mehlville - 2.4
Moline Acres - 2.4
Murphy - 2.7
Normandy - 2.4
Northwoods - 2.4
Norwood Court - 2.4
Oakland - 2.7
Oakville - 2.4
Old Jamestown - 2.4
Olivette - 2.3
Overland - 2.4
Pacific - 2.7
Pagedale - 2.4
Pasadena Hills - 2.4
Pasadena Park - 2.4
Pine Lawn - 2.4
Richmond Heights - 2.4
Riverview - 2.4
Rock Hill - 2.4
St. Ann - 2.3
St. Charles - 2.3
St. George - 2.4
St. John - 2.4
St. Louis - 2.4
Sappington - 2.4
Shrewsbury - 2.4
Spanish Lake - 2.4
Sunset Hills - 2.7
Sycamore Hills - 2.4
Town and Country - 2.3
Twin Oaks - 2.7
University City - 2.4
Valley Park - 2.7
Velda City - 2.4
Velda Village Hills - 2.4
Vinita Park - 2.4
Warson Woods - 2.7
Webster Groves - 2.4
Weldon Spring - 2.3
Wellston - 2.4
Wildwood - 2.7
Winchester - 2.7
Woodson Terrace - 2.4