Vaccine Temperature Log: Printable Sheets and Workbook

A vaccine temperature log is the daily record of each vaccine refrigerator and freezer: the date, time, current temperature, the minimum and maximum since the last reading, who checked, and what was done if any reading fell outside the storage range. It is how a clinic proves the cold chain held, dose by dose.

The CDC Vaccine Storage and Handling Toolkit (updated 14 July 2026) asks providers to check and record minimum and maximum temperatures at the start of each workday and to keep temperature logs for 3 years. In the UK, Green Book chapter 3 asks for the maximum, minimum and current temperature to be recorded at least once each working day. Vaccines exposed to the wrong temperature can lose potency in a way you cannot see, so the log is often the only evidence a dose was stored correctly.

This page explains the ranges, what a compliant daily check looks like, what a digital data logger needs, how to respond to an excursion and a worked example, with links to the CDC and UK sources.

Last reviewed: 30 October 2026.

The CDC toolkit says storage units must keep refrigerated vaccines between 2 °C and 8 °C (36 °F and 46 °F) and frozen vaccines between -50 °C and -15 °C (-58 °F and +5 °F) at all times, with ultra-cold freezers between -90 °C and -60 °C (-130 °F and -76 °F).

Some products have narrower ranges. The CDC gives the example of a frozen RSV vaccine that must stay between -40 °C and -15 °C, so a freezer that holds it alongside other vaccines must not fall below -40 °C. The package insert or EUA fact sheet always wins: the workbook lets you override the range for a single unit.

The CDC says never to use dormitory-style or bar-style combined refrigerator/freezer units for vaccines, even temporarily. The Green Book says specialised pharmaceutical refrigerators must be used and ordinary domestic refrigerators must not.

The CDC recommends a digital data logger (DDL) in every vaccine storage unit and transport unit, with at least one backup, because it records temperatures at set intervals and shows how long an excursion lasted. The toolkit lists these features:

• A detachable probe that best reflects vaccine temperature, buffered with glycol, glass beads, sand or Teflon
• An alarm for out-of-range temperatures and a low battery indicator
• A display of current, minimum and maximum temperature, readable outside the unit
• Recommended uncertainty of plus or minus 0.5 °C (1 °F)
• A logging interval you can program

Calibration testing should be done every 2 to 3 years or per the manufacturer's schedule. A certificate of calibration testing should show the model or device name or number, the serial number, the date of calibration, an uncertainty of plus or minus 0.5 °C (1 °F) or less and confirmation the instrument passed. A device that is not accurate within 0.5 °C must be replaced. In the UK, the Green Book asks for at least one max-min thermometer independent of mains power, calibrated annually.

Place the buffered probe in the centre of the vaccines, away from walls, floor, vents and door. The Units and Loggers tab stores each logger's serial number and certificate due date and turns amber before it expires.

Sample data, for illustration only. A clinic logs a refrigerator (REF-1) and a freezer (FRZ-1) in °C at 8:15 AM each workday from Thursday 1 October.

• Wednesday 28 October: REF-1 shows current 5.0, max 6.1 but min 1.6. The low limit is 2.0, so the Status column shows EXCURSION LOW even though the current reading is fine. That is why the min and max matter: a current-only check would have missed it.
• The logger download shows the temperature below 2 °C from 19:40 to 21:10 the evening before. The incident row works out the duration: 1.5 hours.
• The response: 20 doses across two lots are labelled Do Not Use and kept in the refrigerator. The coordinator calls the immunization program and both manufacturers with the logger data. The answer comes back that the doses can be used; the outcome and case references are recorded and the incident closes on 29 October.
• The month: by Friday 30 October, each unit has 21 readings against 22 workdays, so the summary shows 1 missed check each until Friday's reading goes in. The backup logger's certificate falls due on 2 November, so it shows Due within 60 days.

The outcome in this example is invented. In real life, only the manufacturer or your immunization program can tell you whether exposed doses can be used.

Browse all our compliance templates and record kits. Food businesses use the fridge temperature log, built on the FDA Food Code and FSA rules. Practices that hold controlled drugs use the controlled substance log and narcotic count sheet.

This log helps you record and review vaccine storage temperatures. It is not medical, clinical or legal advice and does not decide whether any vaccine can be used: follow your immunization program, the current CDC Vaccine Storage and Handling Toolkit or Green Book chapter 3, and each manufacturer's instructions. Greenwolf Tech Labs is not affiliated with the CDC, UKHSA, any immunization program or any vaccine manufacturer. See our terms and refund policy.