As of 9:25 AM EDT on March 22, 2026, all 5 cities in Lewis County, NY in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Copenhagen, NY with a reading of 0.3.
Over the next 24 hours, the highest UV Index reading in Lewis County, NY is expected to be 1.4 in Castorland between 12:00 PM - 1:00 PM EDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |