If you have any plants outside, you will probably want to cover them up tonight.
Environment Canada has issued a frost advisory for London and Middlesex County. Forecasters say the temperature is expected to fall to 1 C overnight and that will result in patchy frost throughout the area.
Environment Canada says areas near the shorelines of the Lower Great Lakes will have a lesser chance of frost.
It recommends covering up plants, especially those in frost-prone areas, and to take preventative measures to protect frost-sensitive plants and trees.