Environment Canada has issued a frost advisory for portions of northeastern and central Ontario including Haliburton and Hastings counties.
Patchy frost is likely on Thursday night (September 10) into Friday morning.
Mostly cloudy skies will give way to at least a partial clearing overnight, allowing ground temperatures to fall to near or below the freezing mark.
Frost may damage some crops in frost-prone areas.
Cover up plants, especially those in frost-prone areas, and take preventative measures to protect frost-sensitive plants and trees.