Oh fucking C.
(allow me to Google a bit ... )
.. it is negative 21 C for the static temperature and the thirty mile per hour wind chill factors (shit KPH! I will have to work on this) makes it feel like negative forty C (which incidentally is the same temperature as forty below zero in Fahrenheit).
The national weather service reports that the coldest temperatures of the winter are yet to come. Tuesday, it is supposed to reach negative twenty seven C for the air temperature and still very high winds and some snow = very dangerous wind chill temperatures in the negative fifty degree range F. (Shit, did it again-your turn to google

Kay ... negative forty five C for a wind chill factor with more snow on the way.)
Like I said, Your turn to google.