You should dehydrate your jerky at a temp between 150-160 degrees. The key to making good jerky is low and slow. Dehydrating the meat at this temperature for an extended period ensures that all you remove all the moisture and any chance of bacteria growth. Of course, the time you dry the meat at this temperature will depend on which unit you use and the size of batch you make—but you should expect to spend anywhere from 4-8 hours drying the meat.