weather new england December 21, 2019 10:31 pm It's Been Really Cold, But That's About to Change 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 2:18 Weather forecast: Sunny and mild 3:19 Partly cloudy, high temps reach near 70 2:44 It's a cloudy but warm day in Boston 2:53 Monday starts off cloudy with lingering rain 3:45 Forecast: Showers, areas of fog