As of 4:21 PM EDT on August 17, 2026, all 10 cities in Cobb County, GA in our database have a UV Index reading of High. The city with the highest UV Index reading right now is Marietta, GA with a reading of 6.1.
Over the next 24 hours, the highest UV Index reading in Cobb County, GA is expected to be 9.4 in Smyrna 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 |