As of 3:04 PM EDT on September 21, 2025, out of 12 cities in Marquette County, MI in our database, 11 cities (92%) have a UV Index reading of Moderate, while 1 city (8%) have a UV Index reading of Low. The city with the highest UV Index reading right now is Republic, MI with a reading of 3.8.
Over the next 24 hours, the highest UV Index reading in Marquette County, MI is expected to be 4.5 in Big Bay 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 |