best internal temperature for medium well prime rib roast
No Follow. Medium rare prime rib â that is, meat that is mostly pink with a deeper, nearly red center, is cooked to about 130-135Â°F. At 120-125Â°F the meat is rare, and at 140-145Â°F, it is well done.You should know the USDA recommends cooking beef to a minimum of 145Â°F.how Image. Medium rare prime rib â that is, meat that is mostly pink with a deeper, nearly red center, is cooked to about 130-135Â°F. At 120-125Â°F the meat is rare, and at 140-145Â°F, it is well done.