Toronto is expected to be hit with its "first widespread snowfall" of the season Monday and into Tuesday, the national weather agency said.
Environment Canada has issued a special weather statement that encompasses nearly all of southern Ontario, including Toronto and surrounding regions.
"An Alberta Clipper low pressure area will sail across Southern Ontario tonight into Tuesday. This weather disturbance will bring a general snowfall of 5 to 10 cm with it by Tuesday morning," Environment Canada said on its website.
"Poor winter driving conditions are likely. Untreated roads may become snow covered and slippery."
The high for Monday is -2 C, and then temperatures will drop slightly heading into Tuesday, with a high of -4 C.