Mongolias climate can be described has highly continental dominied climate with warm summers and long, dry and very cold winters. Known as "the land of blue sky", Mongolia is a very sunny country and has usually about 250 sunny days a year. The country has the world's most typical continental climate with extreme diurnal and annual ranges of temperature. Average temperature in most of the country is below zero from November to March and close to it in April and October. Winter nights of -40°C are common most years (minimum recorded -55°C at lake Uvs). Summer extremes reach as high as +40°C in the Gobi Desert and +33°C in the capital Ulaanbaatar. Monthly temperature variations of +45°C and more are not uncommon in many regions of Mongolia.
Lightweight clothes are advised for the summer months, Medium- to heavyweight is neccesary during the winter. Be prepared for very low temperatures, -30°C and lower! Wherever you go, take a sweater for cool evenings, the difference between maxima and minima can vary greatly.
The climate of Mongolia can be classified as Dwc climate; a snow climate with dry winters, less than four months above 10°C and the coldest month lower than -3°C. The southern parts and the Gobi Desert have a BWk climate, a cold desert climate with an annual average temperature lower than 18°C.