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Prime Rib in Roast at 325°F

Exact time and temperature for perfect results.

Roast

Prime Rib

Cook Time

105-150 min

Set Roast To

325°F

cooking temperature

Safe Internal Temp

145°F

63°C · USDA FSIS

Preheat Roast before cooking

Cooking Tips

  • Bring to room temperature (1-2 hours) before roasting
  • Season generously with salt, pepper, garlic, and herbs
  • Use a meat thermometer in the center away from bone
  • Rest for at least 20 minutes before carving

Note: For 5 lb roast, 15-20 min per pound

Other Temperatures for Prime Rib

More Cooking Times You May Need

Prime Rib at 250°F3-4.5 hrsPrime Rib at 450°F15 min

Frequently Asked Questions

How long to cook Prime Rib at 325°F?

Prime Rib takes 105-150 minutes at 325°F in Roast. For 5 lb roast, 15-20 min per pound Always verify internal temperature reaches 145°F.

Is 325°F the best temperature for Prime Rib?

325°F works well for Prime Rib. The most commonly recommended temperature is 250°F. For 5 lb roast, 15-20 min per pound

How do I know when Prime Rib is done at 325°F?

Use an instant-read meat thermometer to check that the internal temperature of Prime Rib reaches 145°F (63°C). At 325°F, this typically takes 105-150 minutes, but always verify with a thermometer.

Can I cook Prime Rib at a different temperature?

Yes. Prime Rib can also be cooked at 250°F, 450°F. Lower temperatures cook more slowly and evenly; higher temperatures cook faster with more browning.