Today in 1983: The Coldest Temperature Ever Recorded on Earth

On July 21, 1983, scientists at Vostok Station in Antarctica measured the coldest air temperature ever directly recorded on Earth: an astonishing -128.6°F (-89.2°C). More than four decades later, that reading still stands as the official record for the coldest naturally occurring air temperature measured by instruments at Earth’s surface.

Here’s the story behind this incredible weather milestone—and why Antarctica remains the coldest place on our planet.

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A Record Frozen in Time

Deep in the heart of East Antarctica sits Vostok Station, a Russian research outpost located nearly 800 miles (1,300 km) from the South Pole. On July 21, 1983, during the depths of the Antarctic winter, instruments there recorded an unbelievable -128.6°F (-89.2°C).

To put that into perspective:

• Water freezes at 32°F (0°C)
• Dry ice sublimates at -109.3°F (-78.5°C)
• The Vostok reading was nearly 20 degrees colder than dry ice!

At temperatures like these:

• Bare skin can freeze in seconds.
• Diesel fuel thickens and becomes difficult to use.
• Metal becomes brittle.
• Moisture in your breath instantly forms tiny ice crystals.

The cold is so intense that even routine outdoor work becomes dangerous.

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Why Is Antarctica So Cold?

Several factors combine to make Antarctica the coldest continent on Earth.

High Elevation

Vostok Station sits about 11,500 feet (3,500 meters) above sea level on the East Antarctic Ice Sheet. Higher elevations generally experience colder temperatures because the atmosphere becomes thinner and holds less heat.

Months Without Sunlight

During the Antarctic winter, the Sun doesn’t rise for months. Without incoming solar energy, the ice sheet continually loses heat to space.

Dry Air

Antarctica is technically the world’s largest desert. Its extremely dry air contains very little water vapor, which normally helps trap heat in the atmosphere.

Clear Skies and Calm Winds

The record-setting night featured ideal conditions for radiational cooling: clear skies, calm winds, and a stable atmosphere that allowed heat to escape efficiently.

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Life at Vostok Station

Despite its brutal climate, Vostok Station has been home to scientists studying Antarctica since 1957.

Researchers there investigate:

• Climate history preserved in ancient ice cores
• Earth’s atmosphere
• Glaciology
• Geophysics
• Astronomy

One of the station’s greatest scientific achievements came when researchers confirmed the existence of Lake Vostok, one of the world’s largest subglacial lakes, hidden beneath more than two miles of ice.

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Could It Get Even Colder?

Possibly.

In 2013, scientists analyzing satellite observations identified several spots on Antarctica’s high plateau where surface temperatures may have briefly dipped below -135°F (-93°C) during exceptionally favorable conditions.

However, those temperatures were measured by satellites looking at the snow surface—not by standard weather instruments measuring air temperature about 6 feet (2 meters) above the ground.

For that reason, the World Meteorological Organization (WMO) continues to recognize the July 21, 1983 Vostok Station measurement of -128.6°F (-89.2°C) as the official world record for the coldest directly measured air temperature.

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Did You Know?

• Antarctica contains about 90% of Earth’s ice.
• It also holds roughly 70% of the world’s fresh water.
• The continent is so dry that parts receive less annual precipitation than the Sahara Desert.
• Winter temperatures across Antarctica’s interior commonly fall below -100°F (-73°C).

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Nature’s Extreme

Records like the one set at Vostok Station remind us just how extraordinary Earth’s weather can be. While much of the Northern Hemisphere is enjoying the warmth of July, Antarctica is locked in months of darkness and some of the coldest conditions found anywhere on our planet.

The next time you think it’s cold outside, remember the scientists who endured -128.6°F in the name of discovery.

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Learn More

• World Meteorological Organization – Weather and Climate Extremes: https://wmo.int/
• NOAA National Centers for Environmental Information: https://www.ncei.noaa.gov/
• British Antarctic Survey – Vostok Station: https://www.bas.ac.uk/
• NASA Earth Observatory – Antarctica: https://earthobservatory.nasa.gov/