AccuWeather reports waves of cool air will move through the Midwest and Northeast this week, with some areas cold enough for the first snow showers of the season by this weekend.

Temperatures have averaged 2-5 degrees Fahrenheit above average since early September from Minneapolis to Chicago, Cincinnati, Philadelphia, New York City and Boston.

The first push of cool air will be rather weak, but will erase above-average warmth from the Midwest to much of the East during the first part of the week.

A second push of cool air may cause temperatures to dip a bit more during the middle to latter part of the week.

The third push will be the most dramatic and can easily bring the coldest air of the season so far to the Great Lakes during Friday and Saturday and then the Northeast Saturday and Sunday. Showers will accompany the cold push.

AccuWeather RealFeel® Temperatures around the Great Lakes will dip into the 30s. Leaf peepers and fans heading to ball games will need to dress warmly and may need a rain slicker.

"The pattern will generate a great deal of clouds, but it is possible that toward the tail end of the cold outbreak in the Midwest Saturday night and the Northeast Sunday night, when skies clear, that a frost or freeze could occur," AccuWeather Senior Meteorologist Dave Dombek said.

Snow showers are most likely from the Minnesota Arrowhead to northern Michigan, parts of Ontario, western Pennsylvania, western and northern New York state and the mountains of northern New England.

"The October cold spell will not be long-lived and will generally be limited to a couple of days," Dombek said.

Following the building chill into this weekend, another warmup is in store during the first part of next week.