Boston August 7, 2017 4:35 pm Weather Forecast: Rain and Fog Monday night: Rain & Fog. Heaviest rain near the south coast. Lows in the 60s. Tuesday: Early shower to emerging sun late. Highs in the 70s late. Wednesday: Sunny and beautiful. Highs in the low 80s. US & World Videos 3:20 Weather forecast: Highs in the 50s 3:11 The weather's great, but the wheels come off the forecast by the weekend 3:14 Weather forecast: Highs near 70 degrees 0:35 Boston will have plenty of sun, warm air Thursday 2:44 Weather forecast: It'll feel like summer in our region