As of 12:56 PM EDT on July 25, 2025, all 13 cities in Gwinnett County, GA in our database have a UV Index reading of Very High. The city with the highest UV Index reading right now is Lawrenceville, GA with a reading of 9.2.
Over the next 24 hours, the highest UV Index reading in Gwinnett County, GA is expected to be 11 in Snellville between 2:00 PM - 3:00 PM EDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |