Mongolia is known to the world as country of Blue Sky of 4 Seasons. In Mongolia there are 257 sunny days a year, often with clear cloudless skies.
Along with Southern Siberia this part of Asia has a continental climate, with long, cold, dry winters and brief, mild, and relatively wet summers.
The average summer temperature is +21°C, (+65°F) and winter is –20°C, (-13°F). The average rainfall is 200-220 mm.
The best time to visit Mongolia is during the Mongolian summer, from the mid of June till last week of August.
This is the safest time of the year to travel to Mongolia in terms of weather, sunny days throughout Mongolia and sufficient rainfall to make the steppes lush and green.
June and September are both very pleasant times to visit Mongolia. September, autumn is enjoyable, colorful, not hot, and not cold. Nomads have plenty of dairy products and are busy processing milk and preparing for winter. Beautiful countryside of Mongolia is even more beautiful and picturesque with the autumn colors.
PRECIPITATION by frequency
-11°C / -24°C
+15°C / +4°C
+22°C / +6°C
+25°C / +12°C
+21°C / +10°C
+16°C / +4°C
+8°C / -6°C
-11°C / -15°C
-13°C / -22°C
The summer season starts in May and lasts until August with temperatures peaking in July. This is the most popular season for tourists visiting Mongolia. The month of May might still see some snowfall, but the weather is usually good.
November to February are the winter months, temperatures are consistently well below freezing. In January and February the temperature can sink as low as -30°C and will not rise above freezing until April arrives. If a visit is planned at this time then very warm clothes will be a necessity as wind chill is a very significant factor. This season features little but strong winds and snow covered landscape but often days of fine, clear weather will break through where the sun shines down on the snow.
Springtime breaks in March and April and temperatures are generally still below freezing. The locals consider this to be the worst of the year. After a long winter with harsh weather, livestock will be thin and may be close to death. There will be much hardship throughout the region but particularly amongst the nomads.
September and October see cooler weather throughout Mongolia. When the autumn sets in, changing colours in the forests of the north provide even more appeal to the already spectacular landscape. At this time of year the weather is known to be extremely variable and clothing should cater to pretty broad conditions. There may be occasional snow in the north however travel is generally unaffected.