As of 8:06 PM PST on November 24, 2025, all 19 cities in Whatcom County, WA 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 Whatcom County, WA is expected to be 0.5 in Lynden between 1:00 PM - 2:00 PM PST tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |