StillGood?
/
USDA-based guidance

USDA-based · · How this page was made · Last reviewed October 10, 2026 · Sources ↓

The picnic and buffet clock: 2 hours, or 1 hour above 90°F

The answer

Hot food stays safe only if it stays at 140°F or warmer. Cold perishable food stays safe only if it stays at 40°F or below. Once it leaves that hold, the clock is 2 hours at room temperature, or 1 hour if the air is above 90°F — a summer picnic, a hot car. Discard anything that misses the clock. At a buffet, keep hot food in chafing dishes, slow cookers, or warming trays; nest cold dishes in ice; use small trays and replace them often.

The two-hour rule is not a suggestion to reheat later. Miss the clock and discard it.

Hold temperatures first

FSIS: hot food should be held at 140°F or warmer; cold food at 40°F or colder. Use a food thermometer to check holding temperatures. While food stays in those ranges, the picnic clock is not running the same way it does on the counter. A chafing dish that has gone lukewarm is no longer a safe hot hold — the clock has started.

The clock once food leaves the hold

Perishable food must not sit at room temperature more than 2 hours — 1 hour when the temperature is above 90°F (outdoor picnic, hot car). Discard anything that misses that clock. Do not “just reheat” after a missed clock; some toxins survive cooking. See the danger zone guide for why — this page does not rewrite it.

The clock is cumulative in spirit: food that sat out for an hour, went back to the fridge, then sat out again is not getting a fresh two-hour free pass. When you cannot honestly track the total time above 40°F, discard it.

What counts as perishable

Meat, poultry, seafood, cooked leftovers, egg dishes, mayo-bound salads, cut melon, soft cheeses, and milk-based dishes are the usual picnic risks (FSIS leftovers + steps-keep-food-safe). Shelf-stable crackers, whole uncut fruit, and unopened commercial cans are not running the same clock — but once a can is opened or a melon is cut, they join the perishable list.

Buffet setup

Keep hot food in chafing dishes, slow cookers, or warming trays. Keep cold food cold by nesting dishes in bowls of ice, or use small serving trays and replace them often (FSIS leftovers + steps-keep-food-safe). Put out smaller amounts and refill from a cold cooler or hot hold in the kitchen rather than leaving one giant bowl out for the whole party.

Coolers and the car

A cooler only works if it stays cold — pack with ice or frozen packs, keep it closed, and keep it out of a hot trunk when you can. Perishable food that warmed above 40°F in a cooler still counts against the clock. CDC’s four steps (clean, separate, cook, chill) still apply outdoors: separate raw meats from ready-to-eat sides, and chill leftovers quickly when you get home.

After the meal

Leftovers that were held safely and refrigerated on time still need the 165°F reheat rule and the 3–4 day leftover fridge window. Anything that missed the picnic clock should already be in the trash — do not pack it “to decide later.”

Sources

Keep reading