US Mortgage Rates for Past 52 Weeks at a Glance The average rate on the U.S. 30-year fixed mortgage dropped below 4 percent this week, near historic lows reached a few weeks ago. Low rates are making home-buying and refinancing more affordable. Here's a look at rates for fixed- and adjustable-rate mortgages over the past 52 weeks: Current avg. Last week 52-week high 52-week low 30-year fixed 15-year fixed 5-yr adjustable 1-yr adjustable All values are in percentage points. Source: Freddie Mac Primary Mortgage Market Survey