Today could have qualified as an early summer day with the warm temperatures and slight muggy feeling. If we had more sun today then we would have reached the 70 degree mark.
The storm that has been impacting us is moving out and dragging along a cold front with it. This front will pass by this evening, taking the humidity with it. A secondary cold front will pass through overnight, dropping temperatures into the 40s. A brisk northwest flow and cooler air aloft will result in a cooler day tomorrow, however the sun will be out in full force. We warm a couple degrees on Thursday to near 60 with a southwest flow and plenty of sunshine.
A front stalls south of our area on Friday which will produce clouds and a chance for some showers. A weak fast moving system moves through the area on Saturday spreading more clouds and showers.
All of that moves out for Sunday with a good deal of sunshine. Light winds may allow for a sea breeze to develop in the afternoon.
Below is a 5 day forecast for Boston, click to enlarge.
Scott Myerson's Weather Blog 