The amount of time deli meat can go without being refrigerated depends on the type of meat, but cured meats can usually go half a day without being refrigerated. Deli meats that are left in hot locations, such as vehicles, shouldn't be consumed because of the risk of bacteria. Generally, deli meats should be kept in a thermal lunch container or an ice chest with ice.
Keeping deli meats in the refrigerator is the safest way to store these meats. Left in the refrigerator, an unopened package of deli meat should be consumed within 2 weeks. Once opened, these meats are usually good for 3 to 5 days.