St. Clair County, MI: Current UV Index and Hourly Forecast

As of 6:55 PM EDT on September 28, 2025, all 11 cities in St. Clair County, MI in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Port Huron, MI with a reading of 0.5.

Over the next 24 hours, the highest UV Index reading in St. Clair County, MI is expected to be 5.2 in Port Huron between 2:00 PM - 3:00 PM EDT tomorrow.

Search Cities in St. Clair County, MI

UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in St. Clair County, MI as of 6:55 PM EDT, September 28, 2025

Current UV Index in Cities in St. Clair County, MI

6:55 PM EDT, September 28, 2025