3 Ways To Reheat Prime Rib

To check for doneness, you can use a meat thermometer. Meat is rare if the internal temperature reaches 120 to 125 degrees Fahrenheit. Medium rare is 130 to 135 degrees Fahrenheit, while medium is 140 to 145 degrees Fahrenheit and medium well is 150 to 155 degrees Fahrenheit. Well done is 160 degrees Fahrenheit. Stick the thermometer into the middle part of the slice to measure the temperature. However, reheating temperatures will vary slightly. [8] X Research source