Click on a day for an hourly weather forecast
The temperatures in Ulaanbaatar in August are usually low and can range between 10°C and 20°C.
You can expect rain for roughly half of the month of August in Ulaanbaatar. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Ulaanbaatar in August 2025.
If you’re planning to visit Ulaanbaatar in the near future, we highly recommend that you review the 14 day weather forecast for Ulaanbaatar before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -17° / -26° | 1 | 21 | 9 | 3 mm | Awful | Ulaanbaatar in January |
| February | -14° / -25° | 3 | 17 | 9 | 6 mm | Awful | Ulaanbaatar in February |
| March | -5° / -15° | 4 | 16 | 11 | 15 mm | Awful | Ulaanbaatar in March |
| April | 6° / -3° | 4 | 18 | 9 | 26 mm | Awful | Ulaanbaatar in April |
| May | 13° / 3° | 4 | 21 | 6 | 47 mm | Bad | Ulaanbaatar in May |
| June | 20° / 10° | 8 | 21 | 1 | 84 mm | Ok | Ulaanbaatar in June |
| July | 22° / 13° | 8 | 23 | 0 | 114 mm | Ok | Ulaanbaatar in July |
| August | 20° / 10° | 8 | 23 | 0 | 99 mm | Ok | Ulaanbaatar in August |
| September | 13° / 4° | 4 | 23 | 3 | 46 mm | Bad | Ulaanbaatar in September |
| October | 3° / -4° | 3 | 20 | 8 | 19 mm | Awful | Ulaanbaatar in October |
| November | -8° / -16° | 3 | 16 | 11 | 13 mm | Awful | Ulaanbaatar in November |
| December | -15° / -24° | 2 | 19 | 10 | 4 mm | Awful | Ulaanbaatar in December |