Boston August 7, 2017 12:40 pm Weather Forecast: Thickening Clouds, Rain Ahead Monday: Clouds thicken, midday shower to late day rain. Highs in the 70s. Monday night: Rain & Fog. Lows in the 60s. Tuesday: Early shower to emerging sun. Highs in the 70s late. US & World Videos 3:36 FORECAST: Rain overnight, clear Sunday 3:45 Forecast: Overnight showers, Sunday hits 70 2:51 Sunny Saturday morning followed by clouds in New England 3:01 Weather: Sunny start to weekend 2:38 Weather forecast: Clear, cool Friday night