New England weather December 21, 2019 11:31 pm With the Official Start of Winter Comes Warmer Weather Tonight: Partly cloudy. Lows in the teens and 20s. Sunday: Mostly sunny. Highs in the 40s. Monday: Mostly sunny. Highs in the low 50s. US & World Videos 3:21 Weather forecast: Partly cloudy, with calm conditions 2:27 Warm and humid Monday in Boston 2:43 Gorgeous start to the week with warm air over New England 3:04 Forecast: Week will start off gorgeous 3:28 Forecast: Mostly cloudy, few showers tonight