Why does spain have such a varied climate?

The climate of Spain is very varied, as well as its geographic location, in mid-latitudes of the temperate zone of the Northern Hemisphere, makes the country have a remarkable climatic diversity. So we went from places with mild temperatures, around 15 ° C, to others that exceed 40 ° C, especially in summer, and from sites with a humid oceanic climate with annual rainfall of more than 2500mm to sites with a climate Mediterranean desert that does not exceed 200mm per year, as is Cabo de Gata, with 150mm per year.