As of 12:08 PM CST on December 30, 2025, all 7 cities in Jefferson County, IA in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Packwood, IA with a reading of 0.9.
Over the next 24 hours, the highest UV Index reading in Jefferson County, IA is expected to be 1.1 in Fairfield between 11:00 AM - 12:00 PM CST tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |