As of 9:39 PM CDT on April 10, 2026, all 9 cities in Grundy County, IA in our database have a UV Index reading of 0, indicating no radiation from the sun.
Over the next 24 hours, the highest UV Index reading in Grundy County, IA is expected to be 1.2 in Reinbeck between 12:00 PM - 1:00 PM CDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |