As of 6:05 PM PST on January 18, 2026, all 5 cities in Sherman County, OR in our database have a UV Index reading of 0, indicating no radiation from the sun.
Over the next 24 hours, the highest UV Index reading in Sherman County, OR is expected to be 1.5 in Grass Valley between 12:00 PM - 1:00 PM PST tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |