Average 30-year mortgage rate rises to 3.45% Long-term U.S. mortgage rates edged higher this week, remaining near historically low levels as a continued enticement to prospective homebuyers. Mortgage giant Freddie Mac said Thursday the average for the benchmark 30-year fixed-rate mortgage rose to 3.45 percent from 3.42 percent last week. The average rate is down sharply from 4.04 percent a...