This is a country with hot in the summer and extremely cold in the winter, with January averages dropping as low as -30°C (-22°F). The country is also subject to occasional harsh climatic conditions known as zud. Ulan Bator has the lowest average temperature of any national capital in the world. Mongolia is high, cold, and windy. It has an extreme continental climate with long, cold winters and short summers, during which most of its annual precipitation falls. The country averages 257 cloudless days a year, and it is usually at the center of a region of high atmospheric pressure. Precipitation is highest in the north (average of 20 to 35 centimeters per year) and lowest in the south, which receives 10 to 20 centimeters annually. The extreme south is the Gobi, some regions of which receive no precipitation at all in most years. The name "Gobi" is a Mongol term for a desert steppe.