As of 1:02 PM PDT on August 30, 2025, all 7 cities in Mason County, WA in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Belfair, WA with a reading of 5.1.
Over the next 24 hours, the highest UV Index reading in Mason County, WA is expected to be 5.7 in Grapeview 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 |