As of 3:07 PM MDT on May 20, 2026, all 17 cities in Summit County, UT in our database have a UV Index reading of High. The city with the highest UV Index reading right now is Summit Park, UT with a reading of 7.3.
Over the next 24 hours, the highest UV Index reading in Summit County, UT is expected to be 8.1 in Summit Park between 2:00 PM - 3:00 PM MDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |