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).
Travel Tips. The Sahara Desert has the highest recorded temperatures in the world. Related Articles. While historic events such as Europe's Little Ice Age in the 1500s through 1700s greatly affected the Sahara Desert's climate for some time, its climate has been relatively stable for the past 2,000 years.