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A record low of −6.0 °C (21.2 °F) was also record in Hoang Lien on 1 January 1974 and 6 January 1974. [25] For ground temperatures, the lowest ground temperature ever record was −6.4 °C (20.5 °F) in Sa Pa on 31 December 1975 while the highest was 74.7 °C (166.5 °F) in Buôn Ma Thuột on 23 May 1982.
In 2011, a ground temperature of 84 °C (183.2 °F) was recorded in Port Sudan, Sudan. [8] The theoretical maximum possible ground surface temperature has been estimated to be between 90 and 100 °C (194 and 212 °F) for dry, darkish soils of low thermal conductivity. [9]
Operation Popeye / Sober Popeye (Project Controlled Weather Popeye / Motorpool / Intermediary-Compatriot) was a military cloud-seeding project carried out by the U.S. Air Force during the Vietnam War in 1967–1972.
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Aerial photograph of Vostok Station, the coldest directly observed location on Earth. The location of Vostok Station in Antarctica. The lowest natural temperature ever directly recorded at ground level on Earth is −89.2 °C (−128.6 °F; 184.0 K) at the then-Soviet Vostok Station in Antarctica on 21 July 1983 by ground measurements.
Temperature scale used to define USDA hardiness zones. These are annual extreme minima (an area is assigned to a zone by taking the lowest temperature recorded there in a given year). As shown, the USDA uses a GIS dataset averaged over 1976 to 2005 for its United States maps. Global Plant Hardiness Zones (approximate).
Temperatures in Seoul fell to −18 °C (0 °F), [12] the lowest in 15 years. [5] Many all-time low temperature records were broken in cities across the south of the country, especially on Jejudo, where Seogwipo and Seongsan recorded the lowest temperatures on record, at −6.4 °C (20.5 °F) and −6.2 °C (20.8 °F), respectively.
Temperatures measured directly on the ground may exceed air temperatures by 30 to 50 °C. [108] A ground temperature of 84 °C (183.2 °F) has been recorded in Port Sudan , Sudan . [ 109 ] A ground temperature of 93.9 °C (201 °F) was recorded in Furnace Creek , Death Valley , California , United States on 15 July 1972; this may be the highest ...