Best Time to Visit Ulaanbaatar
The best time to visit Ulaanbaatar is June and August, when the average temperature is about 15°C and rainfall is low for Ulaanbaatar, at 44–55 mm a month.
Ulaanbaatar weather by month
The wettest month in Ulaanbaatar is July with 63 mm of rain, and the warmest is July at an average 18°C. The coolest is January at -20°C.
| Month | Average temperature | Rainfall | Verdict |
|---|---|---|---|
| January | -20°C / -5°F | 3 mm | Cold |
| February | -17°C / 1°F | 3 mm | Cold |
| March | -8°C / 17°F | 5 mm | Cold |
| April | 1°C / 34°F | 9 mm | Cold |
| May | 8°C / 46°F | 25 mm | Cool |
| June | 15°C / 60°F | 44 mm | Best |
| July | 18°C / 64°F | 63 mm | Rainy |
| August | 15°C / 60°F | 55 mm | Best |
| September | 8°C / 47°F | 21 mm | Cool |
| October | -1°C / 31°F | 9 mm | Cold |
| November | -11°C / 12°F | 6 mm | Cold |
| December | -19°C / -1°F | 3 mm | Cold |
How we pick the best months
- Best: an average temperature of 15–28°C and low rainfall for Ulaanbaatar: under 150 mm, and no more than 60 mm, a quarter above Ulaanbaatar's median month (never set below 60 mm).
- If no month qualifies, we show the three driest months that average 10–30°C instead.
- Wet: 150 mm of rain or more. Rainy: more than 60 mm. Hot: 29°C or more on average. Cool: under 15°C. Cold: under 5°C.
Averages cover day and night, so afternoons are warmer than the figure shown. Weather is only one reason to pick a month: school holidays, festivals and prices matter too.
Search flights to Ulaanbaatar
Picked a month? Compare fares to Ulaanbaatar (UBN) for your dates.
Book a hotel in Ulaanbaatar
Find hotels in Ulaanbaatar
Hotels, hostels & more · Trip.com
Where these numbers come from
Monthly averages for January 2001 – December 2020 from the NASA POWER project, for the area around Chinggis Khaan International (UBN) at 47.65, 106.82. The model covers a grid about 50 km across, so a coastal or hilly spot can run a degree or two different. Retrieved 12 September 2026.
The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center (LaRC) Prediction of Worldwide Energy Resource (POWER) Project funded through the NASA Earth Science/Applied Science Program.