Environment Canada has issued a freezing rain warning for the city of Toronto, warning residents that between five to 10 millimetres of ice could accumulate overnight.

The warning comes as the snow that blanketed much of the GTA on Monday night transitioned into ice pellets and now into freezing rain. Environment Canada said an intense low pressure system is to blame for the first winter storm of the year.

"Surfaces such as highways, roads, walkways and parking lots will become icy, slippery and hazardous," Environment Canada warned.

"Be prepared to adjust your driving with changing road conditions. Beware of branches or electrical wires that could break under the weight of ice."

To make matters worse, winds of 40 km/h and gusting up to 70 km/h at times are expected to sting the city overnight.

The city had been under a special weather statement for most of Monday evening's winter storm, but that has since ended. Some relief is also expected tomorrow as the temperature is set to climb to a high of 6 C, with rain and drizzle falling on the city. 

The freezing rain warning for the Toronto area extended as far west as Burlington and included Vaughan, Richmond Hill and Markham north of the city.

Freezing rain warnings were already in effect for other parts of southern and southwestern Ontario, including Hamilton, Niagara, Simcoe, Waterloo, London and Sarnia.