A Wind Chill Warning is in effect for Perth and Huron Counties.
Environment Canada says an Arctic airmass has settled over Southern Ontario.
Wind chills of minus 30 to 35 are expected tonight and tomorrow morning.
If you’ll be outside make sure you dress warmly and cover as much exposed skin as possible.
A Snow Squall Watch is also in effect for Huron County.
The county could see between 10 and 20cm of snow before morning.