As of 12:12 AM EDT on June 4, 2025, all 2 cities in Nantucket County, MA 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 Nantucket County, MA is expected to be 7.4 in Siasconset 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 |