Bah humbug. Windchill doesn't count!
In Southern Ontario, we are having some wonderful weather systems. There is a war going on between a tropical air mass and an arctic air mass.
On Wednesday, the high was 15 Celcius (60 F for you 'merkins). Wednesday night, the low was 10 C (40 F). By Friday, the weather dropped all the way to -13 C (9 F).
It all happened over a few hours on Thursday too.
I got to watch it all pretty like over here:
http://sciborg.uwaterloo.ca/wcas/forecast/domain3.html
Looks like a nice mild -8 (18 F) over the weekend, and a large -14 (7 F) system trying to move in on Monday.
The 3000 m "Tempurature and Wind" movie is particularly pretty.
(Sort of a different kind of "oh ya, it's cold" 'indicator')