As of 3:58 PM CDT on June 29, 2026, all 8 cities in Jefferson County, OK in our database have a UV Index reading of Very High. The city with the highest UV Index reading right now is Ryan, OK with a reading of 9.7.
Over the next 24 hours, the highest UV Index reading in Jefferson County, OK is expected to be 11.3 in Ryan between 2:00 PM - 3:00 PM CDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |