As of 3:22 PM CDT on September 17, 2026, out of 14 cities in Johnston County, OK in our database, 9 cities (64%) have a UV Index reading of Moderate, while 5 cities (36%) have a UV Index reading of Low. The city with the highest UV Index reading right now is Mannsville, OK with a reading of 3.6.
Over the next 24 hours, the highest UV Index reading in Johnston County, OK is expected to be 7.8 in Tishomingo between 1:00 PM - 2:00 PM CDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |