Qattara Depression
The climate of the Qattara Depression is highly arid with annual precipitation between 25 and 50 mm on the northern rim to less than 25 mm in the south of the depression. The average daily temperature varies between during summer and winter months. The prevailing wind forms a largely bimodal regime with most wind coming from north easterly and westerly directions. This causes the linear dune formations in the Western desert between the Qattara Depression and the Nile valley. Wind speeds peak in March at and minimal in December at .