The chill settles in after the election. Also the polar vortex

 Like attracts like. http://www.accuweather.com/…/polar-vortex-to-vist-…/36890008

Polar Vortex to Blast 200 Million People With Arctic Air

Arctic air associated with the polar vortex will lunge into the North Central United States early next week and will expand southward and eastward to affect about 200 million people as the week progresses.

ACCUWEATHER.COM