In general,
a mild Mediterranean climate prevails in the north of Tunisia;
toward the south the climate becomes progressively hotter
and drier. In the north, temperatures average 9°C (48°F)
in January and 26°C (78°F) in July. The northern
regions have a rainy season that lasts from October to
May. Average annual rainfall is about 610 mm (about 24
in) but may vary greatly from year to year. Annual rainfall
decreases to the south and is only about 200 mm (about
8 in) in the Sahara.
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