The Coldest Places on Earth

Vostok Station, Antarctica

On 21 July 1983, the thermometer at Vostok Station, a Russian research base on the Antarctic plateau, read -89.2°C (-128.6°F). It remains the lowest temperature ever recorded at a surface weather station and the WMO-recognised world record. The station sits at 3,488m elevation and 1,300 kilometres from the South Pole -- high enough that the thin atmosphere offers almost no insulation, and close enough to the pole that in winter there is no solar heating for months at a time.

The Russian Antarctic Expedition has operated Vostok continuously since 1957. In winter, the station is completely isolated -- no flights can operate in temperatures below approximately -50°C because aviation fuel gels. The small team who overwinter there, typically around 25 people, cannot leave for up to eight months. Breathing the outside air directly risks damaging the lungs; exposed skin freezes within seconds. The station also sits above Lake Vostok, one of the world's largest subglacial lakes, which has been isolated under roughly four kilometres of ice for an estimated 15 million years.

Oymyakon and Verkhoyansk, Siberia

Both towns claim the title of coldest permanently inhabited place on Earth, and both have recorded -67.8°C (-90°F) -- Verkhoyansk in February 1892 and Oymyakon in February 1933. The dispute between them has never been formally resolved by the WMO because both readings are old enough that instrument uncertainty makes comparison impossible. What is beyond dispute is that either would be the coldest permanently inhabited place on Earth by a significant margin.

Daily life at these temperatures requires adaptations that are difficult to imagine from a temperate climate. Cars are left running overnight, because engines freeze solid within hours of being switched off. Batteries lose most of their capacity. Spitting freezes before it hits the ground. Eyelashes ice over. Mobile phones stop working. Fuel lines freeze. Cattle in Verkhoyansk are bred specifically for cold resistance and spend the winter in heated barns. Yet both towns have been continuously inhabited for generations. Oymyakon has a population of around 500 people; Verkhoyansk, around 1,000. Winter temperatures routinely drop below -50°C for weeks at a time.

The Antarctic Plateau

Vostok's -89.2°C record applies to surface weather stations with conventional thermometers. When NASA's Aqua and Terra satellites began analysing surface skin temperatures across the Antarctic plateau during clear winter nights, they found something lower. In August 2010, temperatures of approximately -94.7°C (-138.5°F) were detected on the East Antarctic Plateau, subsequently confirmed in multiple years. This is not an air temperature at standard height; it is the temperature of the ice surface itself, measured by satellite-borne infrared sensors.

The mechanism is radiative cooling: on clear, still, winter nights the ice surface loses heat directly to space with almost nothing to interrupt it. The thin, dry Antarctic atmosphere blocks very little outgoing longwave radiation. Elevation accelerates the process further -- at 3,500-4,000m the air is too thin to hold much heat in the first place. The result is a surface cold enough that no instrument left outside unheated would survive, and no human being could remain conscious for more than a few minutes without specialised heated equipment.

Greenland and the Arctic

The Northern Hemisphere's official cold record belongs to Klinck Research Station on the Greenland ice sheet, where an automatic weather station recorded -69.6°C (-93.3°F) on 22 December 1991. The station sits at approximately 3,105m on the summit of the ice sheet, far enough from the ocean and high enough in elevation to approach Siberian conditions in midwinter. This WMO-recognised record surpasses the long-contested claims of Oymyakon and Verkhoyansk under modern instrument standards.

The paradox is that Greenland and the wider Arctic are warming faster than anywhere else on Earth -- a process known as Arctic amplification. As sea ice retreats, dark ocean water replaces reflective ice, absorbing more solar energy and accelerating further warming. The Arctic has warmed at roughly two to four times the global average rate since the 1970s, and the extent of summer sea ice has declined dramatically. This has consequences beyond the Arctic: a warmer Arctic weakens the temperature gradient that drives the polar jet stream, which appears to be making weather patterns in mid-latitudes more persistent -- meaning heatwaves, cold snaps and droughts last longer than they once did.

Northern Canada and Alaska

The coldest temperature ever recorded in North America outside Greenland is -63.0°C (-81.4°F) at Snag in Yukon, Canada, on 3 February 1947. Snag sits in a broad interior valley near the Alaskan border, far from any maritime influence, at an elevation where cold air drains downslope during winter high-pressure events and pools in the basin. At the time of the record, the local indigenous population reported that sound was carrying extraordinary distances, a known phenomenon at extreme cold where temperature inversions create unusual acoustic refraction.

Alaska's record stands at -56.5°C (-69.7°F) at Prospect Creek on 23 January 1971. Both records were produced by the same mechanism: a strong winter anticyclone sitting over the Canadian interior, suppressing all cloud cover, allowing heat to radiate away for days at a time, and producing inversions where temperatures at ground level drop far below those a few hundred metres above. The absence of any ocean within reach -- the Pacific is blocked by mountain ranges, the Arctic Ocean frozen and hundreds of kilometres away -- removes the main source of heat moderation that protects even the coldest coastal locations.

What Makes a Place Extremely Cold?

Elevation is the single largest factor after latitude. For every 1,000m of altitude, air temperature drops by roughly 6.5°C on average -- meaning Vostok's 3,488m elevation starts its winters at a significant disadvantage before any other factor applies. High-altitude plateaus also have thin atmospheres that both lose heat quickly through radiation and offer little thermal mass to buffer temperature swings.

Latitude controls the amount of solar energy received. Polar regions experience months of total darkness in winter, removing the main heat source entirely. Distance from the sea removes the moderating influence of ocean heat stores, which release energy slowly through autumn and winter. Continental interiors can cool without any check on the process.

Clear skies are essential for the most extreme events. Cloud cover acts as a blanket, absorbing outgoing longwave radiation from the surface and re-radiating some of it back downward. Clear, dry air allows heat to escape directly to space. This is why the driest continental basins produce the coldest readings -- they have the least cloud cover and the least water vapour to trap escaping heat. Valley inversions add a final mechanism: cold, dense air drains downslope and pools in basins, sometimes creating temperature differences of 20-30°C between valley bottom and the hillside just above.