As of 12:56 PM CDT on August 18, 2026, out of 9 cities in Washington County, WI in our database, 8 cities (89%) have a UV Index reading of Moderate, while 1 city (11%) have a UV Index reading of High. The city with the highest UV Index reading right now is Germantown, WI with a reading of 5.6.
Over the next 24 hours, the highest UV Index reading in Washington County, WI is expected to be 5.6 in Germantown between 12:00 PM - 1:00 PM CDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |