As of 6:04 PM EDT on May 19, 2026, all 5 cities in Mason County, MI in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Ludington, MI with a reading of 1.7.
Over the next 24 hours, the highest UV Index reading in Mason County, MI is expected to be 8.2 in Ludington 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 |