It could feel as low as -30 C with a frostbite risk possible in some parts of the province as cold air will send temperatures dropping in southern Ontario.
Environment Canada says Saturday will see cloudy skies across much of the Greater Toronto Area and cold winds across the province.
In Toronto the daytime high will stay steady around -8 C, but will feel almost 10 degrees colder with a wind chill near-17 C while it will feel only slightly warmer in Mississauga with a windchill of -16 C.
Things will get even colder into the evening with an overnight low of -23 C in Toronto.
But the mercury will drop to around -29 C with the wind chill in areas like Durham, Oshawa, Barrie, Orillia, Vaughan, Richmond Hill, leading to a risk of frostbite.
Frostbite generally occurs in body parts furthest from the heart like the hands, feet, …