August 6, 2017 8:45 am Forecast: Mostly Sunny, Low Humidity Sunday: Mostly sunny. Highs around 80. Sunday night: Partly cloudy. Lows in the 50s and 60s. US & World Videos 2:50 Track the intense storms move into Boston area 3:40 Second round of rain on the way, isolated thunderstorms possible 3:37 First round of rain arrives in New England 2:40 Weather forecast: Several rounds of heavy rain, thunderstorms 3:11 So how long is Boston's gorgeous weather going to last?