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Phoenix has a hot desert climate (Köppen: BWh), [1] [2] typical of the Sonoran Desert, and is the largest city in America in this climatic zone. [3] Phoenix has long, extremely hot summers and short, mild winters. The city is within one of the world's sunniest regions, with its sunshine duration comparable to the Sahara region.
For the past 21 days, Phoenix has sweltered under temperatures at or above 110 degrees Fahrenheit amid an unrelenting heat wave, shattering a record that has stood for nearly 50 years. Around noon ...
On May 27, temperatures soared up to 102 degrees in Phoenix. Since then, the weather has risen to 100 degrees or above. The average temperature in Phoenix this summer was 98.9 degrees, with an ...
Although high temperatures are common in the Southwest in summer, 100 days in a row above 100 degrees Fahrenheit shattered a record that Phoenix set in 1993, according to the National Weather Service.
Woody plants survive freezing temperatures by suppressing the formation of ice in living cells or by allowing water to freeze in plant parts that are not affected by ice formation. The common mechanism for woody plants to survive down to –40 °C (–40 °F) is supercooling. Woody plants that survive lower temperatures are dehydrating their ...
It is one of the fastest growing conurbations in the country and is speculated to double its population by 2040. [2] The largest metropolitan areas are the Phoenix metropolitan area – Valley of the Sun, and the Tucson metropolitan area – The Old Pueblo. The regions' populace is nestled in the valley of a desert environment. [2]
Over the last five years,the city has averaged 40 days of 110 degrees or higher compared with about five days at the beginning of the last century, according to the Arizona State Climate Office.
Growing degrees (GDs) is defined as the number of temperature degrees above a certain threshold base temperature, which varies among crop species. The base temperature is that temperature below which plant growth is zero. GDs are calculated each day as maximum temperature plus the minimum temperature divided by 2, minus the base temperature.