Temperature Log: Excursions and Time Out of Range
Lists the excursions in a storage temperature log, each with its start, end, duration and extreme reading.
Open the tool → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Unit of the readings
- °C
- Storage range
- Refrigerator, 2°C to 8°C (36°F to 46°F)
- Readings, one per line
- 2026-10-01 08:00, 5 2026-10-01 08:30, 8.4 2026-10-01 09:00, 9.1 2026-10-01 09:30, 7 2026-10-01 10:00, 1.5 2026-10-01 10:30, -0.2 2026-10-01 11:00, 3
Result: 2 excursions outside 2 °C to 8 °C: 1 h 0 min above and 1 h 0 min below, in 7 readings.
The tool opens with these values already filled in. Replace them with your own.
What you enter
- Unit of the readings: Celsius (C) or Fahrenheit (F)
- Storage range: refrigerator, freezer, ultra-cold, or custom (from the package insert)
- Custom range: lowest temperature
- Custom range: highest temperature
- Readings, one per line: date and time (YYYY-MM-DD HH:MM), then the temperature
How this is calculated
Citation
CDC, Vaccine Storage and Handling Toolkit (July 2026): the refrigerator, freezer and ultra-cold ranges, what counts as a temperature excursion, the event record, and the steps after one. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.