The cheapest 30-year mortgage rates are in states like New York and California, averaging 6.84%-7.05%, while the highest rates, 7.12%-7.25%, are in Alaska, West Virginia, and Vermont. Nationally, rates rose to 7.07%, a five-week high. Rates vary by lender, state regulations, credit scores, and loan size. The Federal Reserve's policies and bond market trends heavily influence mortgage rate fluctuations.