The issue is likely that the temperature display is set to Celcius instead of Farenheit. Reference either the manual or the track guide for information on changing the temperature read-out to Farenheit. The unit is flexible enough for use in the U.S.A. or abroad. As a result the unit has an option that allows the user to display temperature in either Farenheit or Celcius. Farenheit temperatures are approximately twice as much as Celcius.