As of 10:27 PM EDT on August 21, 2026, all 31 cities in Barnstable 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 Barnstable County, MA is expected to be 2.9 in East Harwich between 11:00 AM - 12:00 PM EDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |