As of 3:55 PM PDT on July 1, 2026, all 5 cities in Sherman County, OR in our database have a UV Index reading of High. The city with the highest UV Index reading right now is Grass Valley, OR with a reading of 6.5.
Over the next 24 hours, the highest UV Index reading in Sherman County, OR is expected to be 7.6 in Rufus between 1:00 PM - 2:00 PM PDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |