Dry start, dry midday, blossoming snow and rain for the evening drive. Most areas in Eastern New England see first flakes & drops starting 5-7 PM, but snow starts sooner west, with midday snow showers in Vermont and snow flying by mid-afternoon in the Berkshires and Litchfield Hills.
Roads are likely to become slick as soon as mid to late afternoon in these Western areas, but for Central and Eastern New England, bursts of snow and rain will expand during the early evening and treated roads will likely be wet for the first part of the evening drive owing to temperatures above or near the melting point. By 7 PM, road surface temperatures will cool and may become slick.
Expect bursts of snow and rain to transition to mostly snow bursts by late evening, but will taper to lingering snow showers overnight in Southern New England while a shield of heavy snow sets up in Central and Northern Maine, continuing into the day Wednesday.
Elsewhere, snow will be done by Wednesday morning, but slick spots will remain where moisture freezes on roadways as colder air streams into New England, resulting in wind chill values in the teens with wind gusts to 45 mph from the west on Wednesday.
Accumulation maps featured here - the Cape is not included in a coating at this time, but it's entirely possible an overnight snow shower ending what will primarily be rain showers may leave a coating for you, as well.