forecast May 20, 2020 4:19 pm Clear and Cool Wednesday Evening Wednesday evening: Clear with temperatures in the upper 50s. Overnight Wednesday: Clear. Lows in the 40s. Thursday: Sunny and mild. Highs in the 70s. 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