Aviation English
Meteorology

What is Significant Temperature Level?

Significant Temperature Level A specific altitude or flight level at which temperature changes are forecast to be significant for flight operations, affecting aircraft performance, icing risk, or fuel management.

Source: ICAO Doc 9432, FAA PCG

How is “Significant Temperature Level” Used in Practice?

Report any observed deviation from the forecast at the significant temperature level during cruise.

Certification Exam Relevance

ICAO Level 4ICAO Level 5ICAO Level 6EASA FCL.055

Who Needs to Know This Term?

  • Pilots
  • Air Traffic Controllers
  • Cabin Crew

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Frequently Asked Questions

What is Significant Temperature Level?

A specific altitude or flight level at which temperature changes are forecast to be significant for flight operations, affecting aircraft performance, icing risk, or fuel management.

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