forecast September 20, 2021 11:30 am Forecast: Sunshine, Highs Around 70 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 3:45 Afternoon rains expected on Sunday 4:04 Afternoon clouds over the region on Saturday 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