WASHINGTON (AP) — The number of Americans signing contracts to buy homes rose at a healthy pace in January, a sign that home sales are poised to accelerate after a slow start to the year.

The National Association of Realtors said Friday that its seasonally adjusted pending home sales index increased 1.7 percent to 104.2 last month. December's figure was also revised higher to show a decline of only 1.5 percent, considerably better than an estimated drop of 3.7 percent.

The index is now 8.4 percent above its level one year ago and is at the highest level since August 2013.

The data point to a rebound in sales of existing homes in the coming months, particularly as the spring buying season gets underway. Measures of sales and construction fell last month, raising concerns that the housing market would continue to struggle after a weak 2014. But economists expect that strong job gains, low mortgage rates and solid consumer confidence will boost home sales this year.

Pending sales are a barometer of future purchases. A one- to two-month lag usually exists between a contract and a completed sale.

The increase in signed contracts comes after some disappointing data at the start of the year. Sales of existing homes tumbled 4.9 percent in January to a nine-month low, while sales of new homes slipped 0.2 percent. And new construction of homes and apartments fell 2 percent in January.

But healthy hiring should encourage more Americans to start looking at homes. There are 3.2 million more Americans earning paychecks than there were 12 months ago. And younger Americans are finally seeing strong job gains, which could push up the number of first-time homebuyers, a critical ingredient in any housing recovery.

Mortgage rates remain near historic lows. The average 30-year fixed mortgage rate was 3.76 percent last week, according to the mortgage giant Freddie Mac. That has ticked up in recent weeks, but is well below the 4.33 percent average from a year ago.