Because the forecast kind of stinks, let's start with some fun climate stats! May was warmer and wetter than normal, ending a several month streak of dry weather but making it the fourteenth straight month with above average temperatures. The average temperature for the first five months of this year was 49.8 degrees, exactly a degree warmer than 1998, which is tied with 1990 and 1991 as the warmest years ever recorded in Central Park, and more than twelve degrees warmer than the chilly Jan-May of 1875 and 1888.
High pressure over New England is giving us clear skies today and the easterly winds blowing off that high will keep today's maximum temperature in the mid 70s. A cold front approaching from the west is very likely going to kick off showers and thunderstorms overnight and lasting until early tomorrow afternoon. Usually we'd expect dry weather following a cold front's passage but Sunday is complicated and may give us a mix of sun and clouds and perhaps an afternoon shower. Look for weekend highs in the mid 70s.
The complicated weather continues into next week. A ridge of high pressure is expected to form over the North Atlantic. That should lock the Northeast into several days of cool, rainy weather. How cool is a good question. Highs might range from the lower 60s to lower 70s.