As of 3:14 PM EDT on October 6, 2025, all 7 cities in Hillsborough County, NH in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Nashua, NH with a reading of 2.8.
Over the next 24 hours, the highest UV Index reading in Hillsborough County, NH is expected to be 4.5 in Nashua between 1:00 PM - 2:00 PM EDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |