As of 5:40 PM CDT on March 30, 2026, all 9 cities in Washington County, WI in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Hartford, WI with a reading of 1.1.
Over the next 24 hours, the highest UV Index reading in Washington County, WI is expected to be 2.5 in Hartford between 11:00 AM - 12:00 PM CDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |