The optimal time to visit Mongolia is from June to August. During this period, the landscapes are vibrant and verdant, offering a breathtaking sight. The weather is warm with temperatures ranging from 18°C to 28°C, making it an ideal time for outdoor activities and exploration.
Mongolia's geographical location, being landlocked, results in an extreme continental climate characterized by significant temperature fluctuations. While the southern Gobi region can be quite hot during the summer months, it is also the time when rainfall is scarce in the country.
In winter, temperatures plummet to an average of -2°C to -18°C, and can even drop as low as -30°C across Mongolia. Ulaanbaatar, the capital, holds the distinction of being the world's coldest capital city. Due to the severity of the winter season, travel to areas surrounding the city is advisable only between May and October.
While it is possible to travel to Mongolia on the Trans-Siberian Railway throughout the year, certain months offer more rewarding experiences than others. Therefore, consider planning your journey accordingly to make the most of your visit.
Feel free to let me know if you require further assistance or information for your trip to Mongolia!