My dad makes a little over a $100K a year. If you narrow it down to months, he makes roughly $9K a month plus perks. Its technically more than that since he doesn't even work from mid fall to early spring. I guess that's upper middle class, right?
Middle class is generally by household income(whether married or single or whatever).It does depend on where you live.Where I live,I'm upper Middle class,where as if I lived in New york I wouldn't be considered such.It's generally thought to be $100,000 or more(household income).