Mexico Sees Strong Peso, 4 Percent Growth in 2014 Mexico's Treasury Department says the peso will end the year with an average exchange rate of around 12.5 to $1, following recent gains. The department had originally predicted an average rate of 12.9 to $1 when it drew up the 2013 budget last year, but the peso has gained against the U.S. dollar. The exchange rate stood at 12.34 to $1 Monday. The department said it is estimating economic growth of 4 percent for 2014, a bit above the projected 3.5 percent growth rate for 2013. It also predicted continued strength for the Mexican currency in 2014, with an average exchange rate of 12.6 to $1.