A temperature log is a dated record of the temperatures of your refrigeration units, hot holding equipment, and cooked food, checked at regular intervals throughout the day. Health inspectors consider temperature logs the most important compliance record because temperature abuse is the leading cause of foodborne illness. Here is how to set up and maintain a temperature log that protects your business.
For the complete list of items inspectors evaluate, see our health inspection checklist. For a printable template, see our food truck temperature log template. For the broader record keeping picture, see our food safety record keeping guide.
Why temperature logs are critical for food safety
The CDC estimates that 48 million Americans get sick from foodborne illness every year. The majority of outbreaks trace back to improper temperature control: food stored too warm, food not cooked to a safe internal temperature, or food left in the danger zone (41°F to 135°F) for too long. Temperature logs prove that you are monitoring and controlling this risk every single day.
When a health inspector arrives, temperature logs are typically the first document they request. A complete log with consistent entries at regular intervals shows that your food safety system is active. Gaps, missing dates, or entries that look backdated (all in the same handwriting, same ink) signal that temperature monitoring is not part of your daily routine.
Beyond inspections, temperature logs protect you legally. If a customer files a foodborne illness complaint, your logs demonstrate that you followed established food safety procedures. Without them, you have no documented evidence that temperatures were in range on the day in question. For a complete guide to what records inspectors expect, see our FDA Food Code requirements guide.
What temperatures to log
Cold holding equipment
Log the temperature of every walk-in cooler, reach-in refrigerator, and prep table with refrigeration. The target is 41°F or below, as specified by the FDA Food Code. Use a calibrated probe thermometer to verify the built-in unit thermometer. Built-in thermometers can drift over time, so the probe is your reliable check.
Marcus checks all three coolers on his taco truck in Austin every morning before leaving the commissary. He found that one cooler consistently read 2 degrees warmer on the built-in dial than the probe showed. Without the probe check, he would have been relying on an inaccurate reading.
Hot holding equipment
Log the temperature of food in steam tables, warming cabinets, heat lamps, and any other hot holding equipment. The target is 135°F or above. Probe the food itself, not just the equipment display. A steam table dial might read 160°F, but the food in a shallow pan at the edge of the table could be sitting at 128°F.
Cooking temperatures
Log the internal temperature of cooked food at the thickest part. The required minimum internal temperatures per the FDA Food Code are:
- 165°F for 15 seconds: poultry, stuffed items, reheated leftovers
- 155°F for 15 seconds: ground meat (beef, pork, lamb), ground fish, eggs prepared for hot holding
- 145°F for 15 seconds: whole cuts of beef, pork, lamb, fish, and shell eggs cooked for immediate service
Record the food item, the temperature, and the time for every batch.
Receiving temperatures
Log the temperature of incoming deliveries of TCS (Time/Temperature Control for Safety) food. Refrigerated items must arrive at 41°F or below. Frozen items must be solidly frozen with no signs of thawing and refreezing. Reject any delivery that does not meet these standards and document the rejection.
Cooling checkpoints
If you cool cooked food for later use, log temperatures during the cooling process. The FDA Food Code requires food to cool from 135°F to 70°F within 2 hours, then from 70°F to 41°F within 4 additional hours (6 hours total). Record the start time, the time it reaches 70°F, and the time it reaches 41°F.
How often to log temperatures
At opening
Before you serve your first customer, check every piece of temperature-controlled equipment. This baseline reading confirms that everything is within safe limits after being unattended overnight (or since your last service). If a cooler lost power or a door was left ajar, you will catch it here before food is served.
Every 2 to 4 hours during service
Most health departments specify a monitoring interval for hot and cold holding, commonly every 2 hours. Some jurisdictions allow every 4 hours if you can demonstrate that your equipment maintains consistent temperatures. Check with your local health department for the specific interval required in your area. For food truck operators who open and close cooler doors frequently during service, every 2 hours is the safer standard. For daily task guidance, see our food safety checklist.
At receiving
Every delivery of TCS food gets a temperature check upon arrival. This is not optional. A delivery of chicken breast that arrives at 48°F is a delivery that should be rejected. Log the temperature, the supplier, and your accept or reject decision.
During cooking
Every batch of cooked food gets a temperature check at the thickest point before serving. This is especially important for proteins where undercooking creates a direct health risk. Do not rely on visual cues (color, texture) to determine doneness. Use the thermometer every time.
At closing
Take a final reading of every refrigeration unit before you leave for the day. This closing reading becomes your comparison point for tomorrow's opening check. If a cooler is trending warm at closing, you can investigate the cause (overloading, a failing compressor, a damaged gasket) before food sits at an unsafe temperature overnight.
What a complete temperature log entry includes
Every entry in your temperature log should contain seven elements: the date, the time, the equipment name or food item, the temperature reading, whether the reading was within critical limits (yes or no), the initials of the person who took the reading, and the corrective action taken if the reading was out of range.
A complete entry looks like this: "May 3, 2026 / 10:15 AM / Walk-in cooler / 38°F / Yes / MR / No action needed." An out-of-range entry looks like this: "May 3, 2026 / 2:30 PM / Prep cooler / 44°F / No / MR / Adjusted thermostat, moved chicken to walk-in, will recheck in 30 minutes."
The corrective action column is what separates a compliance log from a temperature diary. It shows that when something went wrong, you identified it, responded appropriately, and documented your response.
When temperatures are out of range
Finding an out-of-range temperature is not a failure. Failing to respond to it is.
Cold holding above 41°F: Determine how long the food has been in the danger zone. If it has been less than 2 hours, move the food to a working unit and investigate the cause (overloaded cooler, failing compressor, damaged gasket, door left open). If the food has been above 41°F for more than 4 hours, discard it. Document the finding, the elapsed time, and the corrective action in your log.
Hot holding below 135°F: Reheat the food to 165°F within 2 hours and return it to a properly functioning hot holding unit. If you cannot reheat it to 165°F within 2 hours, discard it. If the hot holding equipment itself is malfunctioning, switch to a backup unit or discontinue that menu item until the equipment is repaired.
Cooking temperature not reached: Continue cooking until the target internal temperature is reached. If the equipment is not reaching the required temperature, switch to a functioning piece of equipment. Never serve food that has not reached its required cooking temperature.
For all out-of-range situations, the documentation pattern is the same: what happened, what you did about it, and when you verified the correction. For tips on passing inspections with solid temperature records, see how to pass a food truck inspection.
Paper logs vs. digital temperature logging
Paper temperature logs are free and familiar, but they come with drawbacks that digital logging eliminates.
Paper problems. Paper logs require you to remember to fill them out (easy to forget during a rush). Handwritten times are self-reported, meaning you write the time yourself, which inspectors know can be inaccurate. Paper gets wet, greasy, and damaged in kitchen environments. Finding a specific entry from 60 days ago means flipping through a binder. And paper logs cannot alert you when a temperature is out of range.
Digital advantages. Digital temperature logging through an app like PassMyKitchen timestamps every entry automatically, so the recorded time is verified by the system. Out-of-range readings are flagged immediately, prompting corrective action before the problem worsens. All entries are stored in the cloud, organized by date and equipment, and searchable. During an inspection, you can pull up any day's readings in seconds. For FDA guidance on thermometer use, digital records pair especially well with calibrated probe thermometers.
In Texas and other states with active food safety enforcement, inspectors increasingly appreciate digital records because they are tamper-evident and organized. The $29 per month cost of a platform like PassMyKitchen is offset by the time saved and the credibility gained.
Simplify your compliance with PassMyKitchen
PassMyKitchen turns temperature logging into a 30-second task. Open the app, enter the reading, and the system timestamps it, checks it against your critical limits, flags any out-of-range values, and stores it for instant retrieval during inspections. Your temperature history is always organized, always accessible, always ready.
Start your free trial and make temperature logging effortless.
Frequently asked questions
How long do I need to keep temperature logs?
Most health departments expect at least 90 days of temperature logs to be readily accessible during an inspection. Some jurisdictions require longer retention. The recommended practice is to keep temperature logs for at least 1 year. Digital storage makes this easy because records accumulate automatically without taking up physical space. For complete retention guidelines, see our food safety record keeping guide.
What thermometer should I use for food safety logging?
A digital probe thermometer with a thin tip is the standard for food safety monitoring. It should read temperatures in the range of negative 40°F to 302°F, have a accuracy of plus or minus 2°F, and display readings within 5 seconds. Calibrate it weekly using the ice-point method (crushed ice and water should read 32°F). Keep a backup thermometer on hand in case your primary one fails during service.
Do I need to log ambient air temperature or food temperature?
Both, depending on the context. For refrigeration units, log the air temperature of the unit using the built-in thermometer and verify with a probe. For hot holding and cooking, log the internal temperature of the food itself using a probe thermometer inserted at the thickest point. The air temperature of a steam table does not tell you the temperature of the food in it.
What if I forget to log a temperature check?
Do not go back and fill in a fake entry. Backdated entries (especially handwritten ones) are obvious to experienced inspectors and damage your credibility more than a single gap. Resume logging at your next scheduled check. If gaps happen regularly, your system needs improvement. Set phone alarms, use an app with reminders, or assign a specific person to temperature duties during each shift.
Can I use a Bluetooth thermometer that logs automatically?
Yes. Bluetooth-connected thermometers that transmit readings to an app are increasingly popular and accepted by health departments. They reduce the manual entry step and provide continuous monitoring. The key requirement is that the data must be retrievable and presentable during an inspection. If your Bluetooth system stores readings in a proprietary app, make sure you can export or display the data when an inspector asks. PassMyKitchen integrates with manual entry for now, with automatic sensor integration on the product roadmap.