Summer is the most popular time to visit Mongolia. In mid-summer, average daytime temperatures are in the 70s and 80s F (20s to low 30s C) with no humidity. The steppe is green and visitors enjoy the full bounty of Mongolia's famed dairy products.
The Naadam Festival is held annually, July 11–15. The week of Naadam is the height of the Mongolian travel season.
Worried about crowds? Mongolia is the world's most sparsely populated independent nation. In the Mongolian countryside, you will enjoy vast open spaces year-round.
In September and early October, temperatures are cooler and snow is possible, but early fall is still a good time to visit Mongolia, particularly to attend the Altai Kazakh Eagle Festival or Golden Eagle Festival. Late fall in Mongolia is typically very cold.
In the winter, temperatures of -40°F/-40°C or below combined with harsh winds can make travel in the Mongolian countryside difficult. In addition, most ger camps are closed in the winter.
Adventurous travelers may consider exploring Mongolia in the spring. Spring weather is notoriously unpredictable, although by mid-May, temperatures are typically warmer and ger camps begin to reopen.