In honor of the “polar vortex” sweeping the USA, I decided to assemble some cold-related info. Cheer up, it could be a lot worse!
HOW COLD IS IT?
(standard pressure 100 kPA unless stated) Fahrenheit Celsius Kelvin
Fresh water freezes 32 0 273
Sea water freezes 28 -2 271
“Zero” (Fahrenheit Scale) 0 -18 255
Coldest common salt (23% NaCl) brine -6 -21 252
Coldest liquid water under pressure (210 MPa) -8 -22 251
Pure (anhydrous) ammonia liquefies -28 -33 240
Mercury freezes -38 -39 234
Fahrenheit equals Celsius; approximate temperature
at which gasoline becomes too thick to flow -40 -40 233
Pressure in propane tank drops to zero -44 -42 231
Coldest antifreeze (70% weight ethylene glycol) -60 -51 222
Coldest calcium chloride brine -62 -52 221
Lowest recorded temperature in North America
Snag, Yukon -81 -63 210
Lowest recorded temperature in Northern Hemisphere
Oymyakon, Siberia -96 -71 202
Dry ice (solid CO2) at standard pressure;
coldest liquid metal alloy (41% cesium, 12% sodium,
47% potassium) -109 -78 195
Welding gas (acetylene) freezes -119 -84 189
Nitrous oxide liquefies; ethane liquefies -128 -88 184
Lowest recorded temperature on Earth’s surface
Dome Fuji, Antarctica -132 -91 182
Lowest upper atmosphere (mesosphere) temperature -148 -100 173
Undiluted alcohol (ethanol) freezes -173 -114 159
lowest melting point of a room-temperature liquid
(2-Methylpentane) -243 -153 120
Whole Body Cryotherapy chamber -256 -160 113
Natural gas (methane) liquefies -258 -161 112
Oxygen liquefies -297 -183 90