With low pressure off of Cape Cod on Sunday, upper air disturbances (vorticities) will rotate through our area on Sunday. Timing of these upper air vorticities is difficult to nail down, but the NAM and to a less extent, the GFS, has a disturbance rotating through between 2 PM and 5 PM on Sunday.
Below average forecast confidence for Sunday, but best guess is that early clouds break for a mix of sunshine and some clouds in the morning and early afternoon. Cloudiness increases during the early afternoon and the upper air disturbance moves through between 2 and 5 PM giving us a chance of widely scattered showers. High temps near 70.