forecast June 18, 2020 12:23 pm Sun Mixed With Clouds for Thursday Afternoon Thursday: Sun and clouds, becoming more humid. Highs 85-90. Overnight Thursday: Clouds fill in. Lows in the 60s. Friday: Humid, hot, clouds to sun. Highs 85-90. US & World Videos 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 3:20 Weather forecast: Highs in the 50s