Canadian temperature conversion chart

[Ruptga]

this is theoretical only

"A substance with a negative temperature is not colder than absolute zero, but rather it is hotter than infinite temperature."

Except that it has been done. It's not theoretical, it's just really hard to explain in layman's terms.

 

[zerocool84]

It's all true (allowing for a little hyperbole).

True minor tale: Some years ago my wife and I spent a couple weeks in the LA - San Diego area at the first of October. On a day with a temp of 21C (about 70F) I realized I was walking around the shopping centre parking lot in a short-sleeved shirt and shorts, and the locals were wearing light sweaters on top of long stuff. I live along the north shore of Lake Superior.

Well in LA/SD, it's shorts weather year round so yea.