what temperature should prime rib be
Prime rib is usually cooked until the center reaches about 115–120°F for rare, 125–130°F for medium-rare, and 135–140°F for medium, measured with an instant‑read thermometer in the thickest part of the roast.
Ideal Internal Temperatures
For most people, medium‑rare gives the classic rosy, juicy prime rib.
- Rare: pull from heat at 115–120°F; it will rise a few degrees as it rests.
- Medium‑rare: pull at 120–125°F (many guides target 125°F as the low end).
- Medium: pull at 130–135°F.
- Medium‑well: around 140–145°F if you really want it more done.
The temperature climbs about 5–10°F while resting, so remove the roast a bit before your final target.
Oven / Grill Temperature
Different methods use different oven or grill settings, but they all aim to bring the internal temp into that perfect medium‑rare zone.
- Slow roast: around 200–250°F oven or indirect grill heat until internal temp is about 120–125°F, then sear hot at the end.
- Classic roast: start hot (around 450–500°F) for a crust, then lower to about 325°F until internal temp reaches range above.
Always rely on a meat thermometer instead of time alone, since roasts and ovens vary.
Quick Scoop (Forum‑style take)
Many home cooks on forums talk about pulling prime rib in the 118–122°F range when using a reverse‑sear: the roast rests while the oven preheats to high heat, then goes back in briefly for a crust and finishes around 125–130°F inside.
“I cook it to about 120°F, then after the sear and rest it lands in that 125–130°F sweet spot for medium‑rare.”
So, if you just want one number for that classic restaurant‑style slice: aim to serve around 125–130°F in the center for medium‑rare prime rib.
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