Summer's last gasp? 20 degrees on the way, find out where

Monday, October 31, 2016, 8:33 PM - Rainy and warm is the name of the weather game in Ontario, with temperatures forecast to hover around the 20 C mark to kick off the first week of November.

A low pressure system approaching from the west will bring showers across southern Ontario and Quebec, but not before pulling warm air up from the southeastern U.S. on Tuesday, flooding the region with unseasonably warm temperatures.

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Warm start to November:

Some areas may see patchy fog develop Tuesday morning, with mainly cloudy skies ahead of the low.

"A few showers are possible in the south, with embedded thunderstorms developing east of Lake Huron and Georgian Bay," says The Weather Network meteorologist Erin Wenckstern. "More widespread showers will be in central and eastern Ontario for Tuesday."

With a strong southwest flow ahead of the system, temperatures in the low to high teens are forecast for much of Ontario, with the low 20s possible in the southwest. For example, Windsor's daytime high for Tuesday is 22^oC, feeling like 27 with the humidity, while the high in the GTA climbs to near 20.

The warm sector makes its way into Quebec on Wednesday, driving temperatures around Montreal into the mid-teens.

After a cold front starts to move through the area on Wednesday, temperatures start to slump back toward average for the latter half of the week, with as much as a ten degree difference between highs on Tuesday and Friday for some places.

A system tracking in from the U.S. is expected to bring steady rain to southern Ontario Wednesday, slowly departing on Thursday morning.

"Most of Canada will be mild during the first week of November and the Great Lakes should have several days of milder weather next week, which could then spread east into Atlantic Canada," says Weather Network meteorologist Dr. Doug Gillham. "However, expect a significant pattern change to develop during mid-November (and persist into December) that will likely feature the dominate trough position near the Great Lakes with below seasonal temperatures expected to become more widespread and dominant for the second half of November."

Some important words of advice from Dr. Gillham: "You may want to get snow tires on sooner rather than later in the Great Lakes."

Southern Ontario experiences taste of winter

The first "appreciable snow" of the season prompted widespread special weather statements for southern Ontario last week.

"There were reports of snowflakes flying overnight Wednesday in several areas including London, Sarnia, Richmond Hill, Markham, Whitby, Kitchener, St. Catharines and Grimsby," said Weather Network meteorologist Matt Grinter. "There were also signs of accumulating snow in the city of Orangeville."

Between 5-10 cm of snow was reported through the day on Thursday, especially for higher elevation areas and parts of eastern Ontario, including the city of Ottawa.

Some areas also saw ice accretion on tree limbs and roads as the precipitation transitioned to freezing rain through the afternoon hours.