Why do those guys talk like that?

Who’s correct here?
People north of the Canadian border or south? And I am talking correct pronunciation of certain words.
When speaking of living in a house is it howse as the southern neighbors pronounce it or howoose as the northern neighbors pronounce it. When pronouncing the word about is it abowt or is it aboot? If you go outside do we go awtside or ootside? If you are out at home plate, is it owt or oot at home plate? Tell me. I want to know. Somebody is right and somebody else is not so right. I had never noticed the late Alex Trebek saying oot or oose. So, there! Plus, I had never noticed the late famed ABC news anchor Peter Jennings saying howoose. So there again.
And what is this deal with Celsius and the metric weather talk? Good grief! Oh so confusing.