Boston September 20, 2019 11:35 pm Weather Forecast: Highs Around 80 Friday night: Mostly clear. Lows in the 50s. Saturday: Sunny, mild. Highs around 80. Sunday: Sunny, summery. Highs in the middle 80s. 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