A for sale sign in front of a home in Miami.

Home prices continued to rise in January, despite slowing growth and some seasonal weakness, a closely watched index showed on Tuesday.

The S&P/Case-Shiller Index showed residential real estate values increased 4.6 percent year-over-year in 20 cities, up slightly from the pace in December. Denver and Miami led the gains over the last 12 months, with homes appreciating 8.4 and 8.3 percent, respectively.