forecast September 20, 2021 8:58 am Forecast: Sunshine, Highs in the Low 70s Monday Today: Brilliant sun, fall air. Highs around 70. Tonight: Cool, clear, quiet. Lows either side of 50. Tuesday: Quiet air, variable clouds. Highs around 70. US & World Videos 3:01 Weather: Sunny start to weekend 2:50 Weekend forecast: It's going to be rather splendid in Boston 3:27 Cold start Friday in New England, but a warmup is on the way 2:35 Weather forecast: Cold start Friday, temps warm up in the afternoon 3:05 Drier pattern sticks around New England…but for how long?