A frost advisory has been issued for parts of the Greater Toronto Area (GTA) tonight, as temperatures are forecast to dip near freezing levels. Environment Canada has warned that the cold snap could pose a risk to sensitive plants and outdoor activities.
Expected Temperatures
According to the advisory, temperatures could drop to between 0 and 3 degrees Celsius in some areas, particularly in outlying regions. The coldest conditions are expected in northern and western parts of the GTA, including Vaughan, Markham, and Mississauga. Urban centers like downtown Toronto may see slightly milder conditions due to the heat island effect.
Areas Affected
The frost advisory covers a broad swath of the GTA, including:
- City of Toronto
- Durham Region
- Halton Region
- Peel Region
- York Region
Residents in these areas are advised to take precautions, such as covering sensitive plants or bringing them indoors. The advisory is expected to remain in effect until early Thursday morning.
What to Expect
Environment Canada meteorologists have indicated that clear skies and light winds will contribute to the rapid cooling overnight. While frost is not guaranteed, the risk is significant enough to warrant the advisory. Daytime temperatures on Thursday are expected to rebound to around 15 degrees Celsius, offering a brief reprieve before a potential return to cooler conditions.
This frost advisory comes as part of a broader pattern of unseasonably cool weather affecting southern Ontario. Residents are encouraged to monitor local forecasts and heed any updates from Environment Canada.



