San Francisco Fed President John Williams said in an interview with Market News International on Monday that the Fed could hike its interest rate in April or June if the U.S. economic data remains strong.

"All else equal, assuming everything else is basically the same and the data flow continues the way I hope and expect, then April or June would definitely be potential times to have an increase in interest rates," he said.

Williams noted that there were still global economic and financial risks but the U.S. economy managed to withstand headwinds from abroad.

Williams is not a voting member of the Federal Open Market Committee (FOMC) this year.