As of 5:35 PM EDT on May 7, 2026, out of 9 cities in Ontonagon County, MI in our database, 5 cities (56%) have a UV Index reading of Moderate, while 4 cities (44%) have a UV Index reading of Low. The city with the highest UV Index reading right now is White Pine, MI with a reading of 2.8.
Over the next 24 hours, the highest UV Index reading in Ontonagon County, MI is expected to be 5.6 in Mass City 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 |