Gratiot County, MI: Current UV Index and Hourly Forecast

As of 5:15 PM EDT on September 18, 2025, all 8 cities in Gratiot County, MI in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Perrinton, MI with a reading of 1.9.

Over the next 24 hours, the highest UV Index reading in Gratiot County, MI is expected to be 5.6 in Alma between 2:00 PM - 3:00 PM EDT tomorrow.

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UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in Gratiot County, MI as of 5:15 PM EDT, September 18, 2025

Current UV Index in Cities in Gratiot County, MI

5:15 PM EDT, September 18, 2025