As of 4:27 PM PDT on June 3, 2026, out of 19 cities in Whatcom County, WA in our database, 17 cities (89%) have a UV Index reading of Moderate, while 2 cities (11%) have a UV Index reading of Low. The city with the highest UV Index reading right now is Sudden Valley, WA with a reading of 3.6.
Over the next 24 hours, the highest UV Index reading in Whatcom County, WA is expected to be 7.5 in Sudden Valley 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 |