As of 2:45 PM PDT on September 20, 2025, all 6 cities in Jefferson County, WA in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Brinnon, WA with a reading of 4.4.
Over the next 24 hours, the highest UV Index reading in Jefferson County, WA is expected to be 4.4 in Brinnon between 2:00 PM - 3:00 PM PDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |