Abu Dhabi is the capital of the United Arab Emirates and the country's second-most populous city, behind Dubai. It is situated on an island in the Persian Gulf, off the Arabian Peninsula's central west coast. Abu Dhabi is the UAE's largest emirate, accounting for over 87% of the country's total land area. Abu Dhabi is a sophisticated metropolis with skyscrapers dominating the skyline. The Sheikh Zayed Grand Mosque, the Louvre Abu Dhabi, and the Yas Marina Circuit are among its many world-class attractions. Abu Dhabi is also a major economic and financial centre, with the headquarters of several worldwide oil corporations. Abu Dhabi has a diverse population, with residents hailing from all over the world. Although Arabic is the official language, English is commonly spoken. The UAE dirham (AED) is the currency. Abu Dhabi has a hot and dry climate, with average temperatures ranging from 24°C (75°F) in January to 41°C (106°F) in July. The city receives extremely little rain, with an annual average of only 100mm (4 inches).