Sunday will start off mostly clear and temperatures in the 20s, although some morning lows may be in the teens for the Pine Barrens. Clouds will quickly increase as the day progresses. Precipitation begins late in the afternoon, but start times can be later if the air is dry enough. Daytime highs are in the mid 30s.
Precipitation begins as snow with sleet mixed in and continues through the evening. Totals are expected to be light, so little accumulation is expected. There may be a coating or a half inch in spots, especially on colder surfaces like grass and cars, by midnight. Overnight, any changeover to rain will be complete as warmer air comes in and winds shift to the east-southeast. The rain may get heavier by morning.
Monday morning's commute will be wet and messy. The steadier rain tapers off to scattered showers for the rest of the day and highs reach the mid 40s.
A cold front sags southward and skies briefly clear for Monday night.
There is some uncertainty about a storm on Tuesday as the front returns northward. The GFS and NAM models show a rain/snow mix ending as snow, while the European model has shown a storm passing offshore. This equates to a chance of rain and snow for Tuesday. Should any mix and/or snow occur Tuesday, heavier bursts of precip will easily leave a light accumulation as temperatures don't get out of the 30s and drop late in the day. More certainty grows with many model runs to go and more accurate forecasts develop.
Regardless of a Tuesday storm, an Arctic blast is heading toward the Northeast for the rest of the week. Highs will be in the low 30s or even only around 30 for Wednesday and Thursday, and may not exceed the mid 20s on Friday. Nighttime lows dip to the frigid teens.