Saudi-arabia deserts
common, while in winter frost or snow can occur in the interior and the higher
mountains. The average temperature range in January is 8° to 20°C (47° to 68°F) in
Riyadh and 19° to 29°C (66° to 83°F) in Jiddah. The average range in July is 27° to
43°C (81° to 109°F) in Riyadh and 27° to 38°C (80° to 100°F) in Jiddah.
Precipitation is usually sparse, although sudden downpours can lead to violent flash
floods in wadis. Annual rainfall in Riyadh averages 100 mm (4 in) and falls almost
exclusively between January and May; the average in Jiddah is 54 mm (2.1 in) and
occurs between November and January.
Vegetation
Vegetation in Saudi-Arabia deserts is very rare. Plants are almost all ground-
hugging shrubs and short woody trees. All of the leaves are replete (packed with
nutrients). Some examples of these kinds of plant are Turpentine Bush, Prickly Pears,
and Brittle Bush
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