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Dry Tropical / Hot Low-Latitude Desert (BWh) Climate. Wadi Halfa, on the Nile River, Sudan, Africa, 22N  Map showing locatin of Wadi Halfa, in the Sahara Desert, NE Africa, Tropical dry (BW) climate    Strong annual temperature cycle, compared to other tropical climates already studied, but less than higher latitude climates.  Intensely hot temperatures in high-sun season. World records for diurnal (daily) temperature range -- over 100°F ! in this climate type! Radiation cooling is rapid at night; heating quickly in sunlight. Very low precipitation -- too little to show.  Precipitation is highly irregular and unreliable in this climate type. Precipitation statistics can be very misleading.   Subtropical High pressure zone is very dominant.  This climate type has hot deserts.