As of 6:33 PM CDT on September 13, 2025, all 5 cities in Johnson County, NE in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Tecumseh, NE with a reading of 0.8.
Over the next 24 hours, the highest UV Index reading in Johnson County, NE is expected to be 6.5 in Tecumseh 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 |