Study Center
Aviation Weather
What are standard sea-level temperature and pressure?
Tap to reveal answer
Answer
15 °C (59 °F) and 29.92 inHg (1013.2 hPa).
These International Standard Atmosphere values are the reference for altimeter calibration and performance charts.
Source: FAA Pilot's Handbook of Aeronautical Knowledge, Ch. 4 · Reviewed 2026-11-08