Faya, sometimes still known by its post-colonial name of Faya-Largeau, is the largest oasis in northern Chad and averages 3,792 hours of sunlight per year. The city has a hot desert climate typical of the region where it is located in the Sahara Desert. Average high temperatures between April and September reach over 102 degrees Fahrenheit (39 degrees Celsius) to record highs of 108 degrees Fahrenheit (42 degrees Celsius) in June. Every month has an average sunshine duration of more than 290 hours. Rain can come from June to September, but some years have no rainfall at all.
