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Typically this is about 18 minutes per pound but Iâll sometimes pull mine out about 20 minutes before that since it will stay warm in the tinfoil (and even room temperature ham is MUCH better than dry)! Most directions for cooking a spiral sliced ham tell you to reheat your ham at 275F and I agree with this method.
To reheat a spiral-sliced ham in a conventional oven, cover the entire ham or portion with heavy aluminum foil and heat at 325 Â°F for about 10 minutes per pound.Individual slices may also be warmed in a skillet or microwave. Cook-before-eating hams or fresh hams must reach 160 Â°F to be safely cooked before serving.o reheat a spiral-sliced ham in a conventional oven, cover the entire ham or portion with heavy aluminum foil and heat at 325 Â°F for about 10 minutes per pound.