Dennis Lockhart, president of the Federal Reserve Bank of Atlanta.

A U.S. interest rate hike is still probably coming in October or December despite some conflicting economic signals, a top Federal Reserve official said on Friday, reinforcing the central bank's message over the last few weeks.

Atlanta Fed President Dennis Lockhart, a well-respected centrist and a voter on the Fed's monetary policy committee this year, said an international slowdown and last month's weak U.S. jobs report show there is "a touch more downside risk" to the U.S. economy.