From CBC News:
The Manitoba Museum is reporting Winnipeg's temperatures on Tuesday were actually as cold as the surface of Mars.
According to the Curiosity Rover, Mars reached a maximum temperature of -29 C on Tuesday, a temperature Winnipeg only reached shortly before 3 p.m.
The deep freeze over much of Southern Manitoba prompted extreme wind chill warnings in the area and most of the north.
In Winnipeg, the daytime high temperature for Tuesday was only expected to reach –31 C, but the windchill made it feel more like –40 to –50. That means exposed skin can freeze in less than five minutes.
On Monday, it got as warm as –28 C.