So far the precipitation being detected by radar is light, disorganized, and most of it is not reaching the ground yet. This will change over the next several hours as areas of flurries and light snow begin to reach the ground. (Should be fun to see some snow in the air during the Giants-Cowboys game tonight). The snow will change to mixed precipitation and rain through much of the area by 3 AM-4 AM. I'm thinking the morning commute will just be wet across southern CT, adjacent areas of southeastern NY, NJ, NYC & Long Island, southern RI and southeastern MA. There will probably still be some mixed precipitation going on though, in northern CT, western MA, and adjacent areas of southeastern NY. The operational runs of the NAM, GFS & ECMWF are relatively close with expected snow accumulations at this point (NAM & GFS pictured below), with roughly 0.5"-1.5" along the shoreline (lowest amounts in NYC & Long Island, where some places might have trouble even accumulating a half-inch), an inch or two elsewhere except 3"-6" across the northwest hills of CT, western MA, Catskills, and Poconos, with some locally higher amounts possible in the high elevations.
Lows mostly in the 20's tonight, however parts of the shoreline may remain above freezing and all areas will see a temperature rise Monday morning, with any mixed precipitation to the north changing to rain and the rain ending in the afternoon, possibly followed by some partial clearing. Highs will reach the 40's tomorrow and NYC/Long Island and the CT coast could hit 50! Remaining in the upper 30's in parts of western MA and the Catskills, though.