Mongolia’s climate can be described has highly continental dominated 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. Winters 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.
Average summer temperature: +20 c (+65 F)
Average winter temperature: -24c (-13F)
Average precipitation: 25,4 cm.
Right time to travel to Mongolia is from mid May till end of the September; even October is still okay month.May, you can still see some snowfall, especially in the North. June weather is good and usually dry throughout the Central and Southern regions. The mountains and Northern areas can be still a bit chilly. July is the time to see the Naadam festival. Gobi temperatures this month can rise up to 40C. In August, there will be heavy rainfall in the Northern and Central areas. This weather fills up rivers and brings the lush green grass, creating a picturesque view, as well as one of the best times to travel in Mongolia. September is another good month, especially in the Gobi region, and October is still warm enough and places become much less crowded.