The pound is gathering supporters.

One month ago, the U.K. currency was seen ending June at $1.42, according to the median of analyst estimates in a Bloomberg survey. That forecast has now risen to $1.45, the highest in almost four months, even as the crucial June 23 vote that will decide the fate of Britain’s membership in the European Union draws closer.

The winds of change are found in the increasing number of surveys that have signaled pro-European voters are pulling ahead of those wanting to break away from the bloc. Sterling has been the best performer among its Group-of-10 peers during the past two weeks, and has climbed from a seven-year low reached in February.

“There is still room for recovery in the pound,” said Thu Lan Nguyen, a currency strategist at Commerzbank AG in Frankfurt. Sterling would be supported “if the market continues to price in that the U.K. will vote to stay in the EU, but it is a fragile state.”

The pound rose 0.8 percent in the week to $1.4623 as of the 5 p.m. close in New York on Friday. It previously climbed 1 percent in period through May 20.

U.S. Factors

Factors outside of the U.K. could also prove important for sterling next week, according to Commerzbank’s Nguyen. The pound fell on Friday after U.S. Federal Reserve Chair Janet Yellen said higher interest rates in the coming months look “appropriate.”

Investor sentiment and jobs data from the U.S. could sway predictions on whether Fed officials will announce tighter monetary policy after meeting on June 15, just days before the U.K. referendum. U.S. non-farm payrolls are forecast to remain steady at 160,000 jobs in May, according to a Bloomberg survey of economists.