Freeze and frost warnings take effect in Mass.

Much of Massachusetts will be under a freeze, frost or flood warning overnight Thursday as the coldest air so far this season arrives via a high pressure system, according to the National Weather Service.

Widespread frost is expected, and many communities further inland are predicted to see freezing temperatures, the weather service said. Coastal areas, Cape Cod and Nantucket are the only regions not expected to experience frost.

Temperatures are predicted to reach their lowest point around sunrise on Friday, which will occur shortly before 7 a.m., according to the weather service. Both the freeze warning and frost advisory go into effect at 11 p.m. Thursday and end at 9 a.m. on Friday.

The freeze warning affects all of Berkshire, Bristol and Hampden Counties, as well as eastern Hampshire County, western Essex County, southern Worcester County, all but the northwestern-most tip of Middlesex County and Plymouth and Norfolk Counties aside from communities along the coast. Subfreezing temperatures as low as 25 degrees are expected in these areas.

The frost advisory affects areas of Plymouth, Norfolk, Essex and Suffolk Counties along the coast, as well as Martha’s Vineyard. Temperatures as low as 33 degrees are expected in these communities.

Residents living in areas affected by the freeze warning or advisory should take precautions to prevent crops or sensitive vegetation from the cold temperatures, which could damage or harm them, according to the weather service.

Daily highs on Friday are expected to reach the low 60s across Massachusetts amid sunny skies, according to the weather service. Overnight lows on Friday are predicted to dip into the low 40s and upper 30s.

Saturday is expected to be warmer, with highs in the mid 60s amid mostly sunny skies, according to the weather service. Overnight lows on Saturday are predicted to reach the low 50s and upper 40s in most the Massachusetts.

A chance of showers begins across the state after midnight on Sunday, according to the weather service. The rain is expected to continue through both Sunday and Monday amid daily highs in the low 60s and upper 50s and overnight lows in the upper 50s and low 40s.

A coastal flood watch is set to go into effect for areas around the Massachusetts coast beginning Sunday morning and lasting through late Monday night.