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Climate data for Yellowknife (Yellowknife Airport) WMO ID : 71936; coordinates 62°27′46″N 114°26′25″W / 62.46278°N 114.44028°W / 62.46278; -114.44028 ( Yellowknife Airport ) ; elevation: 205.7 m (675 ft); 1991–2020 normals, extremes 1942
Altitudes above 2,400 meters display characteristics of tundra, with patches of alpine meadows and some trees immediately below the treeline. The ecoregion is in the montane grasslands and shrublands biome, and the Palearctic realm, with a humid continental climate. It covers an area of 90,132 square kilometres (34,800 sq mi). [1] [2]
[1] The perpetually warm, wet climate makes these environments more productive than any other terrestrial environment on Earth and promotes explosive plant growth. [2] A tree here may grow over 23 m (75 ft) in height in just 5 years. From above, the forest appears as an unending sea of green, broken only by occasional, taller "emergent" trees.
Yellowknife averages 2256.5 hours of bright sunshine per year or 43.5% of possible daylight hours, ranging from a low of 15.4% in December to a high of 63.0% in June. [44] Due to its warm summer temperatures, Yellowknife is well below the Arctic tree line in stark contrast to areas farther east in Canada on similar parallels.
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Climate charts provide an overview of the climate in a particular place. The letters in the top row stand for months: January, February, etc. The bars and numbers convey the following information: The blue bars represent the average amount of precipitation (rain, snow etc.) that falls in each month.
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In the Northwest Territories, transportation and communication can be problematic. [1] Long winters tend to close the rivers to navigation for nearly two months. [1] Apart from the Great Slave Railway and the Mackenzie Highway system, that links to Alberta and to the Great Slave Lake area, commerce, supply, and travel remain largely airborne. [1]