I cite the following post that I've pasted below... 1.5 Liters is what he says: Obada Barry, DMD.
Seasons have a much greater impact in the interior. In the Sahara Desert, summer temperatures often exceed 104ÂºF/ 40ÂºC in summer, but may fall to near freezing during winter nights. In terms of rainfall, the northern part of Morocco is considerably wetter than the arid south (especially along the coast).
The Sahara Desert hosts an incredible array of species that are well-adapted to survive in the desert climate. 70 mammalian species, 90 avian species, 100 species of reptiles, and several species of spiders, scorpions, and other smaller forms of life, call the Sahara Desert their home.