As of 2:33 PM EST on February 18, 2026, all 14 cities in Shiawassee County, MI in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Perry, MI with a reading of 1.2.
Over the next 24 hours, the highest UV Index reading in Shiawassee County, MI is expected to be 1.9 in Owosso between 1:00 PM - 2:00 PM EST tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |