However, in certain areas, such as Asia and central North America, the variations between summer and winter can be extreme because these areas are far away from the sea, causing them to have a continental climate. In regions traditionally considered tropical, localities at high altitudes (e.g. parts of the Andes) may have a temperate climate.
The maritime climate is affected by the oceans, which help to sustain somewhat stable temperatures throughout the year. In temperate zones the prevailing winds are from the west, thus the western edge of temperate continents most commonly experience this maritime climate. Such regions include Western Europe, and western North America at latitudes between 40° and 60° north (65°N in Europe).
Continental, semi-arid and arid are usually situated inland, with warmer summers and colder winters. Heat loss and reception are aided by extensive land mass. In North America, the Rocky Mountains act as a climate barrier to the maritime air blowing from the west, creating a semi-arid and continental climate to the east. In Europe, the maritime climate is able to stabilize inland temperature, because the major mountain range – the Alps – is oriented east-west (the area east of the long Scandinavian mountain range is an exception).
The vast majority of the world's human population resides in temperate zones (if defined as comprising the subtropics as well), especially in the northern hemisphere because of its greater mass of land.
^"The Temperate Climate". The International Sustainability Council. 2008. Retrieved October 4, 2012. "...the north-south aligned Rocky Mountains act as a climate barrier to the mild maritime air blowing from the west."
^"Climate of Switzerland". Swiss University. Retrieved October 4, 2012. "The Alps act as a climate barrier: Southern Switzerland, which is mainly influenced by the Mediterranean Sea, is characterized by a much milder climate than Northern Switzerland."
^Brinch, Brian (2007-11-01). "How mountains influence rainfall patterns". USA Today (Tysons Corner, Virginia: Gannett). ISSN0734-7456. Retrieved October 4, 2012. "As air ascends mountains, such as the Washington Cascades, it is forced to rise. The rising air cools, condenses, and drops rain on locations situated on the windward slopes, like Seattle. When the air descends the back side of the mountain toward Spokane, it is compressed, warming and drying it out. This sinking, dry air produces a rain shadow, or area in the lee of a mountain with less rain and cloudcover."