Boston May 17, 2019 11:35 pm Weather Forecast: Highs in 70s Friday night: Clearing, some fog. Lows around 50. Saturday: Mild and mostly sunny. Highs in the 70s. Sunday: Partly to mostly cloudy, chance shower far north/west. Highs in the 70s. US & World Videos 3:01 Weather: Sunny start to weekend 2:38 Weather forecast: Clear, cool Friday night 2:50 Weekend forecast: It's going to be rather splendid in Boston 3:23 Weather forecast: Warm and mostly dry this weekend 2:45 Chilly in Boston Friday, but there's plenty of sunshine