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At what temperature does water boil up a mountain?

The temperature at which water boils at a height above sea level, or at any air pressure.

m

Fill in a height or a pressure, not both. From −500 to 34,376 m.

Pa

Clear the height and give a pressure instead, for a pressure cooker or a vacuum chamber. Sea level is 101,325 Pa. From 611.657 to 22,064,000 Pa.

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Boiling point

70.3 °C

At 8,849 m above sea level, where the air pressure is 31,439.34 Pa, water boils at 70.3 °C (343.4 K).

Boiling point in kelvin
343.4 K

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How it is worked out

P_mmHg = P/133.322368T = 1730.63/(8.07131-log10(P_mmHg)) - 233.426 [1-100 °C], T = 1810.94/(8.14019-log10(P_mmHg)) - 244.485 [above 100 °C]

Where the numbers come from

Keep in mind

The boiling point follows the local air pressure, which the weather moves by several kPa, or about 1 °C. This uses the standard-atmosphere pressure for the height. Treat the answer as good to 0.5 °C.

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https://clipwright.studio/tools/boiling-point-at-altitude?height_m=8849

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