The average mortgage rate on a 30-year fixed mortgage is 7.14%, down from 7.16% last week.The average rate on a 15-year fixed mortgage is 6.26%, down 0.04 percentage points from the previous week.Borrowers should compare their existing mortgage rate to today's refinance rates to lock in a lower rate.Factors such as credit score, debt-to-income ratio, and loan programs impact mortgage rates for borrowers.