Most of Germany has a temperate climate, ranging from oceanic in the north to continental in the east and southeast. Winters range from the cold in the Southern Alps to mild and are generally overcast with limited precipitation, while summers can vary from hot and dry to cool and rainy. The northern regions have prevailing westerly winds that bring in moist air from the North Sea, moderating the temperature and increasing precipitation. Conversely, the southeast regions have more extreme temperatures.