The city of Toronto is expecting it to be just a rain event starting around the afternoon rush hour, ending mid-morning Tuesday.
In other parts of the GTA, the rain will be mixed with wet snow at times in Peel, York and Durham Regions but no real accumulation is expected.
Farther north into Innisfil and west to Kitchener and Guelph about 2 centimetres of snow is expected.
For Orangeville and western Barrie, 5-10 centimetres of heavy wet snow is in the forecast.
And if you are heading into eastern Ontario there's a heavy rainfall warning up from Belleville to Kingston with as much as 35 millimetres of rain starting Monday afternoon.