Casual sunlight is constant, normally 6 to 8 hours at winter and up to 12 hours in summer. The infrequent very hot, dry, and unclean current of air bringing air from the Sahara Desert can impact any region of the country, especially in spring, while a depression entering the Gulf of Gabes from the west induces southern winds along its easterly wing. This air current and associated weather condition is alike to the khamsin of Egypt but goes by the localised name of chili. When this happens, temperatures might ascend as high as 50°C/122°F, adding a hazard of heat prostration or even heat hyperpyrexia; but such intense circumstances are uncommon and for most of the year the climate of Tunisia is healthy and enjoyable. Temperatures on the seashore are moderated by every day sea breezes, whilst the more high-pitched temperatures inland are rendered less enfeebling by low humidness.

Coastal regions

The coastwise regions, especially to the north, and the northern mountains have a commonly Mediterranean Sea climate with moderate winter rain. Occasional rainfall might fall out in the early on summer and autumn and this can take the form of dense but uncommon downpours. Summertimes are fine and hot.

Central Tunisia

Rain in central Tunisia and the southern hills on the Algerian border is lower. Inland wintertime temperatures might drop rather low with occasional freezes. Summertime temperatures are higher than near the coast.

South Tunisia

The climate goes increasingly dryer toward the south of Tunisia and summertime temperatures could arise really high inland, since this region delivers a virtual Sahara Desert climate. Rain can sometimes be heavy in spring and autumn though days with rainfall are uncommon.