As of 8:37 AM EDT on May 18, 2025, all 9 cities in Ontonagon County, MI in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Mass City, MI with a reading of 0.2.
Over the next 24 hours, the highest UV Index reading in Ontonagon County, MI is expected to be 3.4 in White Pine between 5:00 PM - 6:00 PM EDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |