As of 4:42 PM EDT on July 14, 2025, out of 14 cities in Sanilac County, MI in our database, 12 cities (86%) have a UV Index reading of High, while 2 cities (14%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Marlette, MI with a reading of 5.7.
Over the next 24 hours, the highest UV Index reading in Sanilac County, MI is expected to be 8.7 in Marlette between 2:00 PM - 3:00 PM EDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |