Complex sentence: The lake itself is 2,430 meters above sea level so the local climate is often quite chilly (temperatures are frequently around 10 degrees celsius) making a brisk change from the humidity of the north Java plain and the capital city of Jakarta.
Split into simpler sentences: The lake itself is 2,430 meters above sea level so the local climate is often quite chilly (temperatures are frequently around 10 degrees celsius). This makes a brisk change from the humidity of the north Java plain and the capital city of Jakarta.