As of 8:08 PM EDT on June 27, 2025, all 11 cities in St. Lawrence County, NY in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Ogdensburg, NY with a reading of 0.1.
Over the next 24 hours, the highest UV Index reading in St. Lawrence County, NY is expected to be 7.2 in Hailesboro between 3:00 PM - 4:00 PM EDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |