One of Earth's hottest places is Iran’s Lut Desert. Hot and dry deserts have a mean annual temperature of 20 to 25 degrees Celsius, and the extreme temperatures can range from 43 to 49.5 degrees Celsius during the day and minus 18 degrees Celsius at night. Three of these deserts -- the Chihuahuan, the Sonoran and the Mojave -- are called "hot deserts," because of their high temperatures during the long summer and because the evolutionary affinities of their plant life are largely with the subtropical plant communities to the south. Due to its generally higher elevation, the Chihuahuan Desert is cooler; the mean annual temperature is 18.6 C o. The Chihuahuan Desert is considered one of the most diverse deserts of the world, and a critical reservoir for conserving biodiversity. Northern areas have more severe winters than the southern portion and can receive snowstorms. In 2005, NASA recorded the single highest surface temperature recorded anywhere in the world in … Changing patterns in precipitation and temperature have the potential to shift the latitudinal and elevational distribution of some plant communities and threaten the pemistence of others. Some citrus trees can be grown in the low Mojave desert, such as Palm Springs, California, as well as in Phoenix and Tucson, Arizona in the Sonoran desert where winters are warm. The thermal regime in the Chihuahuan Desert is seasonally similar from year to year with lower temperatures in winter than in summer. Cacti and other succulents can store their water in their roots, leaves or stems so they can survive through the driest and hottest … The desert is home to more than 130 species of mammals, such as the Mule deer and pronghorn. The highest recorded temperature in the Sahara desert is 116.6 °F in the Algerian Desert having an elevation of 1,240 feet above sea level. Soil temperatures at the surface exhibit large daily temperature fluctuations year-round, while at 15 cm depth there are lower daily temperature amplitudes compared to the surface soil. The hottest temperatures occur in areas of low elevations and in the inter-montane depressions in the region. The climate includes a dry summer and occasional winter rains; mild frosts occur during autumn and winter. The Chihuahuan Desert boasts 3,000 plant species, including more than 500 of the world's 1,500 species of cactus. But that’s not the case with all the deserts. In the Gobi desert of central Asia, winter temperatures can drop below -20ºC (-4ºF). The hottest temperatures in the desert occur in lower elevation areas and in valleys. The kit fox roams the vast grasslands of the northern desert. Because of the heat and the lack of rainfall, there are no large canopy trees to shade animals or plants. The desert climate or arid climate (in the Köppen climate classification BWh and BWk), is a climate which there is an excess of evaporation over precipitation.The typically bald, rocky, or sandy surfaces in desert climates hold little moisture and evaporate the little rainfall they receive. Consult your local nursery for the varieties for your area because many citrus trees do not like very hot weather either and are subject to sunburn. Due to its generally higher elevation, the Chihuahuan Desert is cooler; the mean annual temperature is 18.6 deg C. The hottest temperatures occur in areas of low elevations and in the inter-montane depressions in the region. The climate includes a dry summer and occasional winter rains; mild frosts occur during autumn and winter. The plants in the desert have adapted overtime by having prickly stems on them to protect their water storage for example the Prickly Pear Cactus has large spines on it to protect its water. 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