As of 10:17 AM PDT on April 15, 2026, all 10 cities in Cowlitz County, WA in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Cougar, WA with a reading of 2.1.
Over the next 24 hours, the highest UV Index reading in Cowlitz County, WA is expected to be 3.7 in Longview 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 |