The temp on my apple watch is wrong. How do I synch the temp with my local temp?

Found out that going into the iWatch's Settings and scrolling down to Weather, that the default was set to default Cupertino. I live in Phoenix, AZ. The only other default option was New York. Had to go out of setting and get into the Weather app, to add more default cities. After adding Phoenix, was able to find Phoenix as a default option with the Setting's Weather options. After clicking on Phoenix as the default, the temperature shown was now correct for my local temperature.