From the National Weather Service:
Traveling for New Year's festivities tonight? Be alert for some slippery travel across interior sections of Massachusetts.
Rain will arrive toward evening and will begin as some wet snow across parts of western and northern Massachusetts where a slushy inch or two may accumulate, especially in the hills. There may also be some spotty light icing during the change from snow to rain, which should take place between midnight and 2 AM.
On New Year's Day, strong to perhaps damaging wind gusts are possible, especially across the higher terrain in Massachusetts where gusts could reach 60 MPH. Be prepared for scattered power outages as well as downed trees or large branches.
The New Year will start off mild as highs top out in the 40s and 50s, and even some lower 60s in Rhode Island and eastern Massachusetts.