As of 2:23 PM CDT on April 26, 2025, out of 10 cities in Monona County, IA in our database, 9 cities (90%) have a UV Index reading of Low, while 1 city (10%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Mapleton, IA with a reading of 3.1.
Over the next 24 hours, the highest UV Index reading in Monona County, IA is expected to be 6.2 in Onawa between 3:00 PM - 4:00 PM CDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |