Where's Summer? A Cold Weather Blast in July

One of the hottest months of the year will receive a dose of cold weather this week in parts of the country.

An unseasonable dip in the jet stream will usher chilly air in the Midwest early this week and reach parts of the Northeast and South by Wednesday.

Parts of the Upper Midwest will dive into the 40's.

Temperatures will be 10-20° below average for this time of year.

Ahead of the cold air, strong storms will bring heavy rain to parts of the Northeast.

CNN's Jennifer Gray explores the impacts of the July chill in the video above.