In the second day of his testimony to Congress on Wednesday, Powell reaffirmed his hawkish message, though struck a cautious note that debate on the scale and path of future rate hikes was still underway and would be data-dependent.
As a result, the U.S. dollar index , which measures the greenback against a basket of six peers, slipped 0.02% to 105.61.
Conversely, the Bank of Canada on Wednesday left its key overnight interest rate on hold at 4.50%, becoming the first major central bank to suspend its monetary tightening campaign.
The Canadian dollar stood at 1.3808 per U.S. dollar on Thursday, after having weakened to a more than four-month low in the previous session following the decision.
Elsewhere, the kiwi rose 0.03% to $0.6107, having slumped to a near four-month low in the previous session.