Climate
The range has a substantially wetter climate than the arid surrounding desert. The run-off from precipitation in the mountains is more regular than the lowland desert. The rainfall during the 1950s was considerable, although still probably under 600 mm/m² per year. Recently, rainfall has been less than 60 mm/m² per year in the new century (since 2000). Lowland wadi areas called Enneri, receive their water from the mountains down storm channels. The rainfall differs massively from year to year; for example the biggest Enneri, Bardargué, flowed at a rate of 425 m³/sec in 1954, but in the subsequent 9 years, was entirely dry for 4 years, had one short flow each year for 4 years (peaking at 5 m³/sec), and in the ninth year had three flows peaking at 4, 9 and 32 m³/sec.
The mean maximum temperature is approximately 30°C in the lowlands and falls to 20°C in the highest elevations. Mean minimum temperatures are 12°C in the lowlands, but fall to 9°C over most of the ecoregion and are as low as 0°C at the highest elevations during winter months.
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