As of 12:34 PM CDT on May 21, 2026, out of 13 cities in Jasper County, IA in our database, 8 cities (62%) have a UV Index reading of Low, while 5 cities (38%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Sully, IA with a reading of 2.8.
Over the next 24 hours, the highest UV Index reading in Jasper County, IA is expected to be 3.2 in Prairie City between 2:00 PM - 3:00 PM CDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |