A food truck temperature log records the temperature of your refrigeration units, hot holding equipment, and cooked food at regular intervals throughout the day. Health inspectors want to see at least 7 days of consistent records. Here is what your log should include and how to set up a system that takes less than 2 minutes per check.
For the broader picture of food truck compliance, see our food truck compliance guide. For general temperature logging guidance across all food business types, see our temperature log guide.
Why temperature logs matter for food trucks
Temperature abuse is the leading cause of foodborne illness in the United States. According to CDC data, improper holding temperatures and inadequate cooking are among the top contributing factors to foodborne illness outbreaks. For food trucks, the risk is heightened because of limited refrigeration capacity, frequent cooler door openings, and exposure to ambient heat.
Health inspectors check temperature logs during every inspection. They are looking for three things:
- Consistency. Are you logging at regular intervals, or are there gaps?
- Compliance. Are your readings within critical limits (41°F or below for cold holding, 135°F or above for hot holding)?
- Corrective action. When a reading is out of range, did you take action and document it?
Missing or incomplete temperature logs are a common non-critical violation that signals to inspectors that you may not be monitoring temperatures at all. On the other hand, consistent logs with occasional out-of-range readings and documented corrective actions show that your system works and that you take food safety seriously.
What to record in your temperature log
Every temperature log entry should capture six pieces of information.
Equipment name
Identify which piece of equipment you are checking. Use consistent names so your log is easy to read over time. Examples: "Main cooler," "Prep fridge," "Steam table," "Hot holding cabinet," "Flat-top grill (chicken)."
If your truck has multiple coolers or holding units, each one gets its own entries. Marcus has a main cooler and an under-counter prep fridge on his taco truck, so his log includes both at every check.
Temperature reading
Record the actual temperature in Fahrenheit. Use a calibrated probe thermometer for food items and cooking checks. For cold holding and hot holding equipment, you can use the built-in thermometer for routine checks but verify with a probe thermometer periodically (at least once per day).
Record the number exactly as you read it. Do not round to the nearest "safe" number. If the cooler reads 42°F, write 42°F and note the corrective action you took.
Time of reading
Record the exact time of each check. This proves that you are monitoring at the required frequency. If your logs show all entries at the same time (as if they were all filled in at once at the end of the day), inspectors will question their accuracy.
Digital logging through apps like PassMyKitchen automatically timestamps each entry, which eliminates questions about timing accuracy.
Who took the reading
Record the initials or name of the person who performed the check. On a solo food truck, this is always you. On a truck with staff, different people may handle different checks throughout the day.
Was it within limits?
A simple yes or no indicating whether the reading was within the critical limit for that equipment. This makes it easy to scan your log for problems.
Corrective action if out of range
If a reading is outside the critical limit, record what you did about it. This is the most important column in your log because it shows that your HACCP system works. Examples:
- "Cooler at 44°F. Adjusted thermostat, added ice packs. Rechecked at 2:15 PM, read 40°F."
- "Chicken internal temp 158°F. Continued cooking. Rechecked at 12:05 PM, read 167°F."
- "Steam table read 130°F. Reheated beans to 168°F before returning to steam table."
Critical temperature limits for food trucks
These limits come from the FDA Food Code and apply to most food truck operations. Your state may have additional or stricter requirements. Check your state's food code for specifics.
| Category | Critical Limit | What It Means | |----------|---------------|---------------| | Cold holding | 41°F or below | Refrigerators, coolers, and cold prep items must stay at or below this temperature | | Hot holding | 135°F or above | Cooked food held for service must stay at or above this temperature | | Cooking: poultry | 165°F for 15 seconds | Chicken, turkey, and all poultry must reach this internal temperature | | Cooking: ground meat | 155°F for 15 seconds | Ground beef, pork, and other ground meats | | Cooking: whole cuts | 145°F for 15 seconds | Steaks, chops, fish, seafood, and eggs for immediate service | | Danger zone | 41°F to 135°F | Food cannot remain in this range for more than 4 hours total | | Reheating | 165°F within 2 hours | Food being reheated for hot holding must reach 165°F within 2 hours |
If your truck uses time as a public health control (holding food without temperature control for up to 4 hours), you must document the start time for each item and discard it after 4 hours. This requires a separate time log or time-marking system.
How often to log temperatures
The monitoring frequency should match the risk level and your health department's requirements. Here is a practical schedule for a typical food truck day.
At opening (before service starts)
Check every piece of temperature-controlled equipment before you serve your first customer.
- All refrigerators and coolers: verify 41°F or below
- Hot holding equipment: verify 135°F or above (if pre-heated)
- Verify your probe thermometer is on the truck and calibrated
This morning check catches overnight equipment failures and transport temperature changes. If you loaded food at the commissary, check temperatures on arrival at your service location.
Every 2 to 4 hours during service
During active service, check all temperature-controlled equipment at regular intervals.
- Cold holding: every 2 hours (minimum)
- Hot holding: every 2 hours (minimum)
- Cooking temperatures: every batch or every individual item
Some jurisdictions specify the exact monitoring interval. If your health department requires every 2 hours, follow that requirement. If no interval is specified, every 2 hours is the standard practice.
At receiving (when deliveries arrive)
When you receive deliveries at your commissary, check the temperature of all potentially hazardous foods immediately.
- Refrigerated items: must arrive at 41°F or below
- Frozen items: must arrive frozen solid (0°F or below)
- Reject any deliveries that do not meet these standards
Record the supplier, product, temperature, and whether you accepted or rejected the delivery.
At closing (final check before shutdown)
After your last customer and before you shut down equipment:
- Final cooler temperature check
- Verify that all leftover food is properly stored, labeled, and dated
- Record the closing readings
Paper logs vs digital temperature tracking
Paper logs are the traditional approach. You print a form, keep it on a clipboard on the truck, and write entries by hand.
Advantages: no technology needed, free to create.
Disadvantages: easy to lose or damage (grease, water, wind), hard to search or analyze patterns, inspectors sometimes question handwritten entries that look like they were filled in all at once, and paper logs cannot be backed up.
Digital temperature tracking uses an app on your phone to record temperature readings.
Advantages: automatic timestamps (impossible to backdate), stored securely in the cloud, searchable and sortable, always on your phone (never left at the commissary), and presentation-ready for inspectors.
Disadvantages: requires a phone and an internet connection (though most apps work offline and sync later).
PassMyKitchen's temperature logging takes about 30 seconds per check. You open the app, select the equipment, enter the temperature, and submit. The app timestamps the entry, compares it to your critical limit, and prompts you for corrective action if the reading is out of range. All records are stored securely and accessible through inspector mode. For tips on passing inspections with solid records, see our guide on how to pass a food truck inspection.
Setting up your temperature log system
Whether you use paper or digital, follow these four steps to set up an effective system.
Step 1: List all equipment that holds food at temperature. Walk through your truck and your commissary. List every refrigerator, cooler, freezer, hot holding unit, steam table, and warming drawer. Assign each one a clear, consistent name.
Step 2: Assign check times. Based on your service schedule and your health department's requirements, define when each piece of equipment gets checked. At minimum: opening, every 2 hours during service, and closing. Add receiving checks for delivery days.
Step 3: Train all staff on the process. Every person who takes a temperature reading should know how to use the thermometer, where to measure (food surface vs food center vs air temperature), what the critical limit is for each equipment type, and what corrective action to take if the reading is out of range.
Step 4: Review logs weekly for patterns. Look at your logs every week. Is one cooler consistently reading close to 41°F? It may need maintenance. Are hot holding temperatures dropping at a specific time each day? Your equipment may need adjustment or your workflow may need a change. Patterns in your logs help you prevent problems before they become violations. For more on recordkeeping best practices, see our food safety record keeping guide.
Simplify your compliance with PassMyKitchen
Replace the clipboard with an app that is faster, more accurate, and always ready for an inspector. PassMyKitchen turns temperature logging into a 30-second task, stores your records securely, and gives you a compliance score you can check at a glance.
Start your free trial and make temperature logging effortless.
Frequently asked questions
How long do I need to keep temperature logs?
Most health departments require a minimum of one year of records. Some states require two years. When in doubt, keep records for at least two years. Digital records make this easy because storage is automatic. Paper records require organized filing at your commissary. If an inspector asks for records from six months ago, you need to be able to produce them.
What if I forget to log a temperature?
A missed entry is better than a fabricated one. Do not go back and fill in a reading with a made-up number. If you miss a check, note the gap in your log and explain why (busy service, equipment issue, staffing). Then resume logging at the next scheduled interval. Occasional gaps are understandable. A pattern of gaps suggests your monitoring system is not working.
Do I need a special thermometer for my food truck?
You need a calibrated digital probe thermometer that can measure the internal temperature of food items. Look for a thermometer with a thin probe (for measuring thin items like burger patties), a digital display, and accuracy to plus or minus 2°F. NSF-certified thermometers are recommended. Popular options include instant-read thermometers that give readings in 2 to 5 seconds. You should also have a thermometer inside each refrigeration unit for continuous monitoring. Budget $15 to $50 for a good probe thermometer.
Can I use my phone to log temperatures?
Yes. Digital temperature logging using your phone is accepted by health departments in Texas, California, and virtually every other state. The FDA guidance on food safety thermometers focuses on the accuracy of the measuring device, not the recording method. Many inspectors actually prefer digital records because they are timestamped, organized, and easy to review. PassMyKitchen is designed specifically for this workflow: take the reading with your thermometer, log it in the app on your phone, and move on.