How cold is the outside of a plane at 35000 feet?

At 35,000 ft. (11,000 m), the typical altitude of a commercial jet, the air pressure drops to less than a quarter of its value at sea level, and the outside temperature drops below negative 60 degrees Fahrenheit (negative 51 degrees Celsius), according to The Engineering Toolbox.



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“Aircraft at cruising altitude will often experience temperatures of minus 50 to minus 70 F for hours on end.” Generally, engines like cold weather. Since cold air is denser than warm air, engines provide more power because there are more oxygen molecules.

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Between 9,000 and 12,000 metres (30,000 and 40,000 feet), the cruising altitude of most jet aircraft, air temperatures range from -40 to -70 °F (-40 to -57 °C). Modern aircraft have sealed cabins and heaters to protect pilots and passengers from wind blasts and cold air.

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The Boeing 747-8 Intercontinental, the most recent 747 passenger variant, has a typical cruise speed of Mach 0.86 while flying at an altitude of 35,000 feet, according to Boeing.

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So a cabin that's too warm can further increase the chances of a passenger fainting. Because everyone's body temperatures are different, airlines would rather keep the cabin a little too cool and have some passengers be cold instead of having even one passenger faint.

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Layers, Layers, Layers Pashminas, shawls, wraps, cardigans, sweatshirts, vests, and light jackets are perfect. You can even fold or roll soft items, like cotton jackets, and use them as makeshift pillows during flight. Plus, the more layers you pile on your body, the less you need to pack in your luggage.

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Most flights are intended to spend as little time as possible over water, since storms are more common over the ocean than on land. An aircraft would not be safe to fly over the Pacific Ocean due to the stormy weather and frequent lightning strikes that occur there.

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Specifically, the cruising speed of commercial airliners is typically around 550-600 mph, or Mach 0.85. Takeoff and landing speeds are much slower, typically between 130-180 mph, depending on the aircraft and weather conditions.

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The reason planes cruise at high altitudes is that they burn less fuel and can fly faster, as the air is less dense. At 30,000 feet and higher, it is also possible for aircraft to avoid weather systems, making it more comfortable onboard.

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Whether flying at night or during the day, pilots need to see some kind of horizon. They use this to determine the airplane's attitude. At night pilots will turn their gaze from outside to inside and use the artificial horizon. The artificial horizon is normally a simply globe split into two hemispheres.

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Many large widebodies have a ceiling of up to around 43,000 feet (12,500 meters). The Airbus A380, for example, is 43,100 feet and the A350 and Boeing 787 are the same (although the larger 787-10 and A350-1000 are lower at 41,100 feet and 41,450 feet).

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According to USA Today, the common cruising altitude for most commercial airplanes is between 33,000 and 42,000 feet, or between about six and nearly eight miles above sea level.

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