“Generally speaking, car loan interest rates fall gradually throughout the year.
From January to December, the average car loan rate falls about 1.5%, so that should give you some idea of when to buy. You’ll also get better deals on new cars in December as dealers try to clear out the last year’s inventory.
You should also keep an eye out for car loan specials that lenders have throughout the year. During the Fourth of July, Memorial Day, and Labor Day, many lenders offer promotional APRs, so it may be worth your time to buy during these holidays.”