On top of Mt. Everest, water can boil at 156.2 °F (69 °C).

What we know as the boiling temperature of water is only for standard pressure. When there is a change in pressure (for instance, at a higher elevation) the boiling temperature changes as well. So instead of water boiling at 100 °C or 212 °F, at 8,848 m (29029 feet) high, the boiling temperature is much lower. It actually decreases by 1°C every 285 m (935 ft) of elevation.
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