Charts are updated daily  Daily PESO to Dollar Exchange Chart shows the daily Mexican peso exchange rate with the US Dollar for the past few days. Number on the right is how many pesos per dollar, number on the bottom is the day of the month.

Daily to Annual Range Chart shows the daily to weekly to annual Mexican peso exchange rate with the US Dollar from Yahoo! Finance.

Mexican Peso to U.S. Dollar Xrates 30-day Mexican Peso to U.S. Dollar. Also available on 120 days or a monthly average.