The National Weather Service says temperatures could reach the freezing point in the Triangle early Sunday morning.
The weather service issued a freeze watch for the Piedmont, including Wake, Franklin, Orange, Durham, Chatham and Lee counties and points west.
Forecasters expect temperatures to fall to freezing a few hours after midnight Sunday and bottom out around sunrise. Plants that are sensitive to cold could be killed.
Temperatures will warm to near 60 on Sunday under sunny skies, before plunging again overnight. Patchy frost is possible again Monday morning before a weekday warmup begins.