forecast September 20, 2021 7:06 am Forecast: Clear Skies, Highs in the 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 3:24 Weather forecast: Highs in the 50s 3:43 Look out for showers this afternoon in Boston 3:41 Cool air to linger over Boston into the weekend 3:17 Cooling back down, weekend turns wet in Boston 3:02 Dry and cooler in our region, with temps in the mid-50s