As of 5:56 PM PDT on July 9, 2025, all 9 cities in Columbia County, OR in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is St. Helens, OR with a reading of 1.9.
Over the next 24 hours, the highest UV Index reading in Columbia County, OR is expected to be 6.4 in St. Helens between 3:00 PM - 4:00 PM PDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |