An area of high pressure sitting just off Cape Cod last night will drift away today. Rainy conditions from an approaching low pressure system will move in from the West, bringing an end to the sunny weather of the past two days. The rain, however, will stick around for a while, perhaps until Friday as the associated warm and cold fronts stall over the area by mid-week.
The heaviest rainfall seems most probable during Wednesday and Thursday. Despite the expected rain and cloud cover, temperatures shouldn’t be too chilly. A weak southerly flow will maintain highs in the 60s°F (16-20°C) from Wednesday through Friday. By the end of that time frame, the cold front should finally push out of New England and allow clear weather to overspread the area. But meanwhile, make sure to carry an umbrella for most of this week!