Nantucket County, MA: Current UV Index and Hourly Forecast

As of 4:29 PM EDT on April 22, 2025, all 2 cities in Nantucket County, MA in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Madaket, MA with a reading of 1.7.

Over the next 24 hours, the highest UV Index reading in Nantucket County, MA is expected to be 6.5 in Siasconset between 1:00 PM - 2:00 PM EDT tomorrow.

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UV Index Risk Levels
Range0 - 23 - 56 - 78 - 1011+
Color
RiskLowModerateHighVery HighExtreme
UV Index in Nantucket County, MA as of 4:29 PM EDT, April 22, 2025

Current UV Index in Cities in Nantucket County, MA

4:29 PM EDT, April 22, 2025