forecast September 22, 2021 6:50 am Forecast: Muggy, Highs in the 70s Wednesday Today: More clouds than sun, turning humid, inland sprinkle/shower at times. Highs 75°-80°. Tonight: Humid, mostly cloudy, patchy fog. Lows in the 60s. Thursday: A few showers, humid. Highs near 80. US & World Videos 2:32 Cool air, scattered rain in store for Boston 2:55 Much cooler temps Tuesday, with scattered rain 2:44 Weather forecast: Scattered morning rain 3:21 Weather forecast: Partly cloudy, with calm conditions 2:27 Warm and humid Monday in Boston