The lowest ever recorded in the contiguous 48 States, was -69.7°F (rounded off to -70°F) at Rogers Pass, in Lewis and Clark County, Mont., on Jan. 20, 1954. Rogers Pass is on State Highway 200 about 40 miles northwest of Helena.
http://usatoday30.usatoday.com/weather/wcstates.htm
The coldest temperature ever recorded east of the Mississippi River was -60°F in Tower, Minn., on Feb. 2, 1996. Hawaii is the only state that's never recorded a below-zero temperature. Many are surprised at Hawaii's 12°F reading.
http://usatoday30.usatoday.com/weather/wcstates.htm
The lowest natural temperature ever directly recorded at ground level on Earth is −89.2 °C (−128.6 °F; 184.0 K), which was at the Soviet Vostok Station in Antarctica, on July 21, 1983.
https://en.wikipedia.org/wiki/Lowest_temperature_recorded_on_Earth
State by state low temperature records. Each state's low temperature record. As you would expect, the coldest temperature ever officially recorded in the USA was in Alaska. It was -79.8°F-rounded off to -80°F-observed at Prospect Creek Camp in the Endicott Mountains of northern Alaska on Jan. 23, 1971.
http://usatoday30.usatoday.com/weather/wcstates.htm
The average temperature there should come in at 6.2 degrees for this month, said Corey Bogel, a meteorologist for the National Weather Service. That's about 15 degrees below normal and easily beats the old record of 8.4 degrees, from January 1994.
http://www.nbcnews.com/news/weather/coldest-month-ever-northeast-bids-bitter-goodbye-february-n314326
In 1908 he managed to lower the temperature to less than four degrees above absolute zero, to less than −269 °C (4 Kelvin). Only in this exceptionally cold state will helium liquify, the boiling point of helium being at −268.94 °C.
https://en.wikipedia.org/wiki/Lowest_temperature_recorded_on_Earth
It really was the coldest month ever. At least if you live in a handful of cities in the shivering Northeast. They just weathered the coldest month since reliable records were first kept, which for most places means a century or more of weather data.
http://www.nbcnews.com/news/weather/coldest-month-ever-northeast-bids-bitter-goodbye-february-n314326
A subsequent measurement of −88.3 °C (−126.9 °F; 184.8 K), on August 24, 1960, held the record until a temperature of −89.2 °C (−128.6 °F; 184.0 K) was measured at the Soviet Vostok Station, on the Antarctic Plateau, on July 21, 1983. This remains the record for a directly recorded temperature. A 2009 study estimated that under exceptional climate conditions similar to those recorded at Vostok in 1983, temperatures higher on the plateau around Dome Argus could potentially drop as low as −95 °C (−139 °F; 178 K).
https://en.wikipedia.org/wiki/Lowest_temperature_recorded_on_Earth
This winter is just one of those things. It's luck of the draw, Bogel said from the weather service office in Caribou, about 150 miles to the north Bangor, where it's been even colder — 2.5 degrees on average this month. Usually these patterns last for a week or so.
http://www.nbcnews.com/news/weather/coldest-month-ever-northeast-bids-bitter-goodbye-february-n314326
In laboratories, a record low temperature of 100 pK, or 1.0 × 10 −10 K in 1999. The current apparatus for achieving low temperatures has two stages. The first utilizes a helium dilution refrigerator to get to temperatures of millikelvins, then the next stage uses adiabatic nuclear demagnetisation to reach picokelvins.
https://en.wikipedia.org/wiki/Lowest_temperature_recorded_on_Earth
what is the coldest temperature ever in the us
The coldest temperature ever in the United States is minus 79.8 degrees Fahrenheit.