How Cold is it Outside an Airplane?

Posted by on Sunday, February 12, 2017
airliner, airplane, clouds

You have enough to worry about when flying, but here is something else... just how cold is it outside an aircraft?

Suppose you were on a plane at 30000-40000 ft (9-12 km) the temperature would be -44.35°C to -56.5°C.

That temperature is if the plane stands still, but if travelling at say 900 km/h and factoring in the wind chill it can feel like -119°C.

Beyond that height, the temperature stays constant up to 20 km altitude, and no airplane has flown at any more than that height.

The Team

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