Different in different parts of the empire.
The climate of the Aztec empire was humid and hot.
There were numerous Islamic Empires which crossed all sorts of climates, from deserts to plains, to mountains, to deciduous, coniferous, and tropical forests.
There is no Islamic Empire.
Your question is incomplete. You need to say which empire.
The title of the Islamic Empire was Caliphate. The Caliph was called Amir-ul-Momineen.
It depends on the Islamic Empire in question. Assuming that you are talking about the Abbassid Caliphate (which is most commonly referred to as "the Islamic Empire"), the group that brought them down was the MONGOLS.
In 1492 the Islamic Empire finally left Spain but i dont know when it began.
hot, dry and arid. Desert temps.
Yes. The Mughal Empire was a great Empire of the Muslims in India.
The Safavid Empire of Iran from 1501-1736 was a strongly theocratic Shiite Islamic State. When compared to the more open and secularized contemporaneous Islamic states like Alaouite Moroccan Kingdom, the Ottoman Empire, and the Mughal Empire, it was much more "single-mindedly religious".
Ottoman Empire
The Abbasids, as the ones from the Islamic Empire.