Frost advisory issued for Toronto, most of southern Ontario

Frost is seen on a window in this undated photo. UNSPLASH/Osman Rana

By Meredith Bond

Posted October 9, 2025 2:47 pm.

A frost advisory was issued by Environment Canada for Toronto and most of southern Ontario on Thursday as temperatures are expected to drop to just above freezing overnight.

The overnight low for Thursday is 1 C after a below seasonal day with a high of just 13 C.

The weather agency issued the advisory for Thursday night into Friday morning as frost could damage some crops in frost-prone areas. They recommend residents cover up plants and take preventative measures to protect frost-sensitive trees and plants.

The temperature will be a little warmer on Friday leading into the Thanksgiving weekend with a high of 17 C and an overnight low of 10 C.

The weekend originally looked beautiful with sunshine expected, but the updated forecast shows a chance of scattered showers on both Saturday and Sunday with highs near 17 C.

Thanksgiving Monday is expected to have some early-morning showers before a mostly cloudy day with sunny breaks and a high of 16 C.

Submit a Correction

Accessibility Feedback

Top Stories

'Income is gone': Injured Beaverton mom says thousands in GoFundMe funds vanished

A GoFundMe campaign set up to benefit a mother of 10 who was severely injured is under investigation by Durham Regional Police because the woman says she has yet to receive a majority of the funds raised. The...

SPEAKERS CORNER

12m ago

Retired TPS homicide detective Hank Idsinga's new memoir sheds light on 'racism and dysfunction' in policing

Warning: This story contains offensive language, discretion is advised As the former head of homicide for Toronto police, Hank Idsinga was instrumental in solving some of the city's most notorious crimes. His...

11m ago

Toronto cop accused in 'Project South' corruption probe to stay behind bars after review

A Toronto police constable accused of leaking information to criminals in a wide-reaching corruption case will stay behind bars after a bail review in Ontario's Superior Court. Const. Timothy Barnhardt...

2h ago

FIFA World Cup: Toronto paramedics get late request for stadium staffing amid coverage concerns

The City of Toronto FIFA World Cup 2026 sub-committee heard a request to approach Durham, York and Peel region for support during matches.

1h ago

Top Stories

'Income is gone': Injured Beaverton mom says thousands in GoFundMe funds vanished

A GoFundMe campaign set up to benefit a mother of 10 who was severely injured is under investigation by Durham Regional Police because the woman says she has yet to receive a majority of the funds raised. The...

SPEAKERS CORNER

12m ago

Retired TPS homicide detective Hank Idsinga's new memoir sheds light on 'racism and dysfunction' in policing

Warning: This story contains offensive language, discretion is advised As the former head of homicide for Toronto police, Hank Idsinga was instrumental in solving some of the city's most notorious crimes. His...

11m ago

Toronto cop accused in 'Project South' corruption probe to stay behind bars after review

A Toronto police constable accused of leaking information to criminals in a wide-reaching corruption case will stay behind bars after a bail review in Ontario's Superior Court. Const. Timothy Barnhardt...

2h ago

FIFA World Cup: Toronto paramedics get late request for stadium staffing amid coverage concerns

The City of Toronto FIFA World Cup 2026 sub-committee heard a request to approach Durham, York and Peel region for support during matches.

1h ago

Most Watched Today

1:22

Rainfall expected to last through next week in Toronto

Toronto is in for a rainy week as showers are expected to last throughout the next few days.

5h ago

1:34

Drone footage captures massive fire at Toronto Yacht Club

Aerial footage captured the massive fire that erupted at the Toronto Yacht Club, where firefighters were seen battling the blaze.

6h ago

3:47

3-alarm fire rips through Toronto Humber Yacht Club

A fire at the Toronto Humber Yacht Club gutted the clubhouse on Wednesday but no injuries were reported. The Ontario Fire Marshal has been called in.

4h ago

2:43

Temperatures tumble again starting tomorrow

Temperatures will drop to below seasonal with some frost possible towards the end of the week. Meteorologist Natasha Ramsahai has your seven-day forecast.

19h ago

2:28

Toronto trading card business owner suffers $36K loss after break-in

There have been a number of robberies and thefts targeting trading card businesses in the Greater Toronto Area. Nick Westoll visits an east-end shop that recently dealt with a major loss after a break-in.

20h ago