As of 3:02 PM CDT on May 22, 2026, out of 15 cities in Fond du Lac County, WI in our database, 14 cities (93%) have a UV Index reading of Moderate, while 1 city (7%) have a UV Index reading of High. The city with the highest UV Index reading right now is Van Dyne, WI with a reading of 5.7.
Over the next 24 hours, the highest UV Index reading in Fond du Lac County, WI is expected to be 5.7 in Van Dyne 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 |