St. Louis County, MO: Current UV Index and Hourly Forecast

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As of 2:29 PM CDT on October 15, 2025, all 98 cities in St. Louis County, MO in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Chesterfield, MO with a reading of 4.8.

Over the next 24 hours, the highest UV Index reading in St. Louis County, MO is expected to be 5.2 in Wildwood between 1:00 PM - 2:00 PM CDT tomorrow.

Search Cities in St. Louis County, MO

Current UV Index in Cities in St. Louis County, MO

• Affton - 4.8
• Ballwin - 4.8
• Bel-Nor - 4.7
• Bel-Ridge - 4.7
• Bella Villa - 4.8
• Bellefontaine Neighbors - 4.7
• Bellerive Acres - 4.7
• Berkeley - 4.7
• Beverly Hills - 4.7
• Black Jack - 4.7
• Breckenridge Hills - 4.7
• Brentwood - 4.8
• Bridgeton - 4.8
• Calverton Park - 4.7
• Castle Point - 4.7
• Champ - 4.8
• Charlack - 4.7
• Chesterfield - 4.8
• Clarkson Valley - 4.8
• Clayton - 4.7
• Concord - 4.8
• Cool Valley - 4.7
• Country Club Hills - 4.7
• Country Life Acres - 4.8
• Crestwood - 4.8
• Creve Coeur - 4.8
• Crystal Lake Park - 4.8
• Dellwood - 4.7
• Des Peres - 4.8
• Edmundson - 4.7
• Ellisville - 4.8
• Eureka - 4.8
• Fenton - 4.8
• Ferguson - 4.7
• Flordell Hills - 4.7
• Florissant - 4.7
• Frontenac - 4.8
• Glasgow Village - 4.7
• Glen Echo Park - 4.7
• Glendale - 4.8
• Grantwood Village - 4.8
• Green Park - 4.8
• Greendale - 4.7
• Hanley Hills - 4.7
• Hazelwood - 4.8
• Hillsdale - 4.7
• Huntleigh - 4.8
• Jennings - 4.7
• Kinloch - 4.7
• Kirkwood - 4.8
• Ladue - 4.8
• Lakeshire - 4.8
• Lemay - 4.8
• Manchester - 4.8
• Maplewood - 4.8
• Marlborough - 4.8
• Maryland Heights - 4.8
• Mehlville - 4.8
• Moline Acres - 4.7
• Normandy - 4.7
• Northwoods - 4.7
• Norwood Court - 4.7
• Oakland - 4.8
• Oakville - 4.8
• Old Jamestown - 4.7
• Olivette - 4.8
• Overland - 4.7
• Pagedale - 4.7
• Pasadena Hills - 4.7
• Pasadena Park - 4.7
• Pine Lawn - 4.7
• Richmond Heights - 4.7
• Riverview - 4.7
• Rock Hill - 4.8
• Sappington - 4.8
• Shrewsbury - 4.8
• Spanish Lake - 4.7
• St. Ann - 4.8
• St. George - 4.8
• St. John - 4.7
• Sunset Hills - 4.8
• Sycamore Hills - 4.7
• Town and Country - 4.8
• Twin Oaks - 4.8
• University City - 4.7
• Uplands Park - 4.7
• Valley Park - 4.8
• Velda City - 4.7
• Velda Village Hills - 4.7
• Vinita Park - 4.7
• Warson Woods - 4.8
• Webster Groves - 4.8
• Wellston - 4.7
• Westwood - 4.8
• Wilbur Park - 4.8
• Wildwood - 4.8
• Winchester - 4.8
• Woodson Terrace - 4.7