Interest rates on jumbo loans are higher than interest rates on conventional loans. This is because jumbo loans are considered to be riskier than conventional loans. The average APR for a 30-year fixed jumbo mortgage is 6.89%, while the APR for a 30-year fixed jumbo refinance is 6.94%. This means that if you have a jumbo mortgage, and you are considering refinancing, now might be a good time to do so. Rates are still relatively low, and they are not expected to rise significantly in the next few months.