 
 <prompt> Wetin dey extremely uncommon for Cairo? Based on di previous question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: Most of Egypt rain dey fall for winter months. South of Cairo, rainfall dey average around 2 to 5 mm (0.1 to 0.2 in) per year and e dey happen at intervals of many years. For one very small area for di northern coast, rainfall fit reach as high as 410 mm (16.1 in), mostly between October and March. Snow dey fall for Sinai mountains and some of di north coastal cities like Damietta, Baltim, Sidi Barrany, etc. and e dey happen rarely for Alexandria. A very small amount of snow fall for Cairo on 13 December 2013, wey be di first time Cairo see snowfall for many decades. Frost dey happen for mid-Sinai and mid-Egypt. Egypt na di driest and di sunniest country for di world, and most of di land surface na desert. 