What is the internal temperature a steak should be cooked to for Rare/Medium Rare/Medium/Well?
Extra-Rare: 125F (52C)
  
  Rare: 135F (57C)
  
  Medium-Rare: 145F (63C)
  
  Medium: 160F (71C)
  
  Well-Done: 170F (77C)


Note: Extra-Rare and Rare are not recommended by USDA