Cooler air will move in behind the cold front on Saturday morning. High temperatures today are expected to stay in the 50s and low 60s but there will be plenty of sunshine.
Overnight into Sunday morning temperatures can drop to the mid 30’s in some locations and patchy frosts may develop for some! The National Weather Service has highlighted locations where frost is a possibility, so it’s best to bring cold-sensitive plants outdoors or cover them. This may also be the case on Monday mornings in some locations, but not as widespread as on Sunday mornings.
Temperatures will gradually warm up again during midweek as high pressure systems move into the region. Expect more sunshine throughout the week before a cold front arrives towards the end of the week with rain and cooler air.
https://whdh.com/news/weather/cooler-saturday-frost-possible-sunday-am/ Saturday cooler, Sunday morning frost possible – Boston News, weather, sports