Food temperature control: rules, limits and logging

Not sure which temperatures actually apply when you handle food? Temperature is one of the most important limits in food safety, and it is often where things go wrong when people fall ill. Here are the practical limits for chilling, freezing, hot holding and cooling, and how to log them without drowning in paperwork.

Why temperature is so critical

Most bacteria that cause food poisoning thrive between 8 and 60 degrees. This range is often called the danger zone. The longer food stays here, the more the bacteria multiply. Your goal is simple in principle: keep food either properly cold or properly hot, and limit the time it spends in the danger zone.

Temperature is also one of the first things inspectors check. Being able to show regular measurements and follow-up demonstrates that your food safety management works in practice.

The temperature limits you should know

Chilling and freezing

Chilled food is normally kept at 4 degrees or below. Some ingredients, such as fresh fish, should sit even colder, close to 0 to 2 degrees. Keep frozen food at −18 degrees or colder. Set the temperature low enough to have a margin, since fridges and freezers fluctuate as doors open and stock is replenished.

Hot holding and reheating

Food kept hot should stay at a minimum of 60 degrees the whole time it is on display. When you cook or reheat, a core temperature of 75 degrees is a safe rule of thumb that the food is heated through. Measure in the thickest part, which heats up last.

Cooling

If you cool down hot food, it has to happen quickly. A common recommendation is to go from around 60 to below 10 degrees within roughly two hours, then further down into the fridge. Split large batches and use shallow containers so the food clears the danger zone faster.

Goods receipt

Check the temperature already when deliveries arrive. Measure chilled and frozen goods on receipt and note any deviation straight away. That way you catch a broken cold chain before the goods reach your own fridge.

How to measure and log

Use a thermometer you know is accurate, and calibrate it regularly. Measure in the right place and keep a fixed frequency, for example morning and evening for fridges and freezers. What matters most is that the log is easy to keep in a busy day, and that it actually gets done.

When a reading deviates

A deviation is not a disaster, but something you should handle and document. Write down what happened, what you did with the food, and what you do to prevent it from happening again. Systematic deviation handling is what separates real food safety management from a binder that only looks good.

From paper forms to digital logging

Many still record temperatures on paper, which quickly leads to gaps in the log and forms that go missing. With wireless sensors and a digital solution like Runwell, measurements can happen automatically. You are alerted the moment something deviates, and all your documentation sits in one place, ready to show when the inspector visits. That way you spend your time on the food and the guests, not on hunting for a form.