The brutal cold ended up mostly being confined to NY/New England with serious record cold temps up there, including the following. However, we did have record cold in Newark (5F) and LGA (5F), but these temps are still a fair amount warmer than the record cold temps not too far to the north of there and it only got down to 15F in Philly. There were also some below 0F temps in NW NJ (not records as far as I know).
And it hit -46F up on Mt. Washington (all-time record there is -47F) with a US record wind chill of -107F last night. Just a little chilly, lol. Strange winter so far with extended record warmth most of the time, punctuated by two intense cold snaps around Christmas and now.
-10F Boston (first time -10F since the 1950s; coldest ever there is -18F)
-1F Cape Cod
-6F Block Island
-3F Nantucket
-2F Montauk
-3F Bridgeport
-13F Albany
-8F Hartford
-5F Poughkeepsie
-9F Providence
-13F Binghamton
5F Newark
5F LGA