As of 12:11 PM PDT on May 2, 2026, all 8 cities in Multnomah County, OR in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Portland, OR with a reading of 4.4.
Over the next 24 hours, the highest UV Index reading in Multnomah County, OR is expected to be 5.5 in Gresham 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 |