As of 1:27 PM EDT on September 20, 2026, all 19 cities in Middlesex County, MA in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Cambridge, MA with a reading of 0.9.
Over the next 24 hours, the highest UV Index reading in Middlesex County, MA is expected to be 5.4 in Cambridge between 12:00 PM - 1:00 PM EDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |