As of 2:30 PM CDT on May 21, 2026, out of 9 cities in Grundy County, IA in our database, 6 cities (67%) have a UV Index reading of Low, while 3 cities (33%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Dike, IA with a reading of 3.1.
Over the next 24 hours, the highest UV Index reading in Grundy County, IA is expected to be 6.6 in Wellsburg 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 |