As of 1:17 PM CDT on May 21, 2026, out of 10 cities in La Crosse County, WI in our database, 7 cities (70%) have a UV Index reading of High, while 3 cities (30%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Onalaska, WI with a reading of 6.3.
Over the next 24 hours, the highest UV Index reading in La Crosse County, WI is expected to be 6.7 in Onalaska 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 |