A cold arctic air mass is moving across Southern Ontario and is expected to drop temperatures near or below zero degrees.
A frost advisory has been issued by Environment Canada for a majority of southern Ontario, including London, Parkhill, Strathroy, Komoka and Eastern and Western Middlesex County.
Conditions are expected to continue into Monday morning.
Forecasters stated that frost is quite likely, especially in areas where the wind can become light or calm under mainly clear skies.
Preventative measures are being recommended to protect frost-sensitive plants and trees. Tender plants should be protected or brought indoors this evening if possible.
Environment Canada stated that temperatures will rise throughout Monday to an afternoon high of 16.