UV Index Today in Middlesex County, Massachusetts (MA)
Friday, May 22, 2026 -12:59 PMEDT (GMT-4)
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The average maximum UV Index today across 90 locations in Middlesex County, Massachusetts (MA), is 7.6. The highest projected maximum is 7.7 in Waltham at 1:00 PM EDT, while the lowest projected maximum is 7.5 in Boston at 1:00 PM EDT.
Tomorrow, the average maximum UV Index across those same locations is expected to be 4.2. The highest projected maximum is 4.8 in Lowell at 1:00 PM EDT, and the lowest projected maximum is 3.7 in Fitchburg at 1:00 PM EDT.
41 County Subdivisions in Middlesex County, Massachusetts (MA)
Maximum UV Index Today
49 Places in Middlesex County, Massachusetts (MA)
Maximum UV Index Today