Climatologists are warning of a huge cool down after Santa's run through the region.
Below normal temperatures are on the way, beginning Christmas Day and possibly lasting into 2018.
An Arctic ridge is expected to plunge much of Alberta and the prairies to well the norm.
"Temperatures in the area, probably around the -20C mark, maybe a little colder than that, daytime highs around -15C, give or take," explained Environment Canada meteorologist, Dan Kulak.
The average high for this time of year is around -8C.
And will it be a white Christmas?
"I don't think we're going to see a lot of snow, maybe some little dustings but the big thing is, get ready for the cold snap, the coldest air of the season," warned Kulak.
Officials remind that with the colder temperatures comes the need to dress properly, as the risk of hypothermia and frostbite increases.
The coldest Christmas Day ever recorded in Fort Saskatchewan was in 1971 when the mercury dropped to -38, without the wind chill.