Thursday's official midpoint was 218 pips or 0.33 percent stronger than the previous fix of 6.6251 per dollar on Wednesday.

The move in the official midpoint was also the biggest one-day strengthening in percentage terms since Nov. 23.

Market participants said the official fix was in line with their forecasts, reflecting the dollar's movements in global trade overnight.

The dollar tumbled after the Fed raised interest rates in a widely expected move, but left its rate outlook for the coming years unchanged.