Mortgage rates dropped across the board today, led by a 6 basis point (a basis point equals 1/100 of a percent) decline in both the 30-year fixed and 30-year fixed refinance rates. The good news keeps coming for home buyers considering a jumbo fixed rate alternative -- "jumbo" loans are generally required if you need to borrow more than $417,000, though that varies somewhat depending on individual housing markets -- as the rate on a 30-year fixed jumbo dropped another 4 basis points. Tacked on to the the previous three days' declines, the rate is now down a cumulative 32 basis points. The average rates on other loan options all inched downward as well, mostly by 2 to 4 basis points. Here are all of today's average mortgage rates across the U.S., along with where they stood a month ago. Mortgage Type Mortgage Rates Today Mortgage Rates 1 Month Ago 30-year fixed jumbo 4.27% 4.46% 30-year fixed 3.82% 3.90% 15-year fixed 3.05% 3.10% 30-year fixed refinance 3.80% 3.90% 15-year fixed refinance 3.04% 3.10% 5/1 ARM 3.19% 3.11% 5/1 ARM refinance 3.28% 3.28% Data source: Bloomberg. National average rates which may include points. Mortgage rates continue to edge closer to their record lows, particularly when compared with loan costs from a few years back. For some perspective, here are the average mortgage rates from May 2007. Mortgage Type Mortgage Rates May 2007 30-year fixed 6.26% 15-year fixed 5.97% 1-year ARM 5.52% 5/1 ARM 5.98% Data source: Federal Home Loan Mortgage Corporation (Freddie Mac). Rates do not include points. For homeowners considering a home equity line of credit (HELOC) or equity loan, the strong housing market continues to work in their favor. HELOC loans held steady at 5.30% while equity loans eased a point to 5.26%. A month ago, HELOCs were 5.30% and equity loans 5.28%. 5 Simple Tips to Skyrocket Your Credit Score Over 800!Increasing your credit score above 800 will put you in rare company. So rare that only 1 in 9 Americans can claim they're members of this elite club. But contrary to popular belief, racking up a high credit score is a lot easier than you may have imagined following 5 simple, disciplined strategies. You'll find a full rundown of each inside our FREE credit score guide. It's time to put your financial future first and secure a lifetime of savings by increasing your credit score. Simply click here to claim a copy 5 Simple Tips to Skyrocket Your Credit Score over 800. The Motley Fool has a disclosure policy.