Louisiana's average APR for a 30-year fixed mortgage is 6.201%, down 0.062 points from last week and below the national average. The 15-year fixed mortgage rate rose slightly to 5.229%. Refinance rates for 30-year fixed mortgages fell to 6.305%. Rates have generally trended downward over three months. To secure the best rates, buyers should maintain strong credit, shop lenders, and consider a 20% down payment.