As of 11:42 AM CDT on September 19, 2026, out of 790 cities in Wisconsin in our database, 783 cities (99%) have a UV Index reading of Low, while 7 cities (1%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Herbster, WI with a reading of 3.3.
Over the next 24 hours, the highest UV Index reading in Wisconsin is expected to be 4.4 in Watertown 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 |