A frost advisory has been issued for the London area, with temperatures expected to drop near the freezing mark overnight.
Environment Canada has issued a frost advisory for London and Middlesex County, warning frost may damage some crops and plants.
"Cover up plants, especially those in frost-prone areas," Environment Canada said in a statement. "Take preventative measures to protect frost-sensitive plants and trees."
The forecast calls for a clear Sunday evening in London with a low of plus 1 Celsius and patchy frost.
Sunshine to start the work week on Monday, with a high of 15 Celsius.