The advisory, which is in effect from 2 a.m. until 8 a.m. Monday, includes Dutchess and counties north. It does not include Westchester, Putnam or Rockland.
However, the entire region will see the coldest overnight temperatures in months, with overnight lows dipping to the upper 30s in parts of the area, including possibly as low as 35 degree in Dutchess under clear skies.
A frost advisory means widespread frost is expected and sensitive outdoor plants may be killed if left uncovered.
After areas of frost through 9 a.m. Monday in some spots in the Hudson Valley, temperatures will climn to the upper 60s under mostly sunny skies.
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