Oranges last longest in a cool area that’s well ventilated. Keep them off the floor to help keep the air moving around the fruit. Oranges maintain their “just picked” freshness for up to six weeks when stored between 30 & 50 degrees F. The best temperature range for grapefruit is between 50 & 55 degrees F. The skin is sensitive to cold and blemishes appear but it does not affect the fruit inside. Citrus keeps longer if refrigerated.