Looks like someone asked this question in the Lounge and got an answer. It is in the owners manual but we couldn't find it. http://www.mazdas247.com/forum/showthread.php?123813104-US-CX-5-GT-Climate-temp-display-in-C
Does anyone know how to change the Climate Control to display the temperature in degrees Fahrenheit as opposed to Celsius? We just got our new 2013 Mazda CX-5 GT last night and ended up spending 30 minutes with the salesman trying to figure it out. Everyone from the dealership gave it a try...