Weather in Ulaanbaatar in August 2025
Average weather
Average temperature in Ulaanbaatar in August
Going from a maximum of +31°C during the day to a minimum of +6°C during the night, the temperature in August averages around +23°C.
The average maximum temperature goes down 28% by the end of the month, compared with the beginning of the month, from +31°C to +24°C.
Is Ulaanbaatar warm or cold in August?
Ulaanbaatar is typically mild in August.
Maximum temperatures go down compared to the previous month from +24°C to +22°C. The minimum temperature also goes down from +13°C to +11°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
August is one of the warmest months in Ulaanbaatar, here is the comparison with other months:
Climate in Ulaanbaatar in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +24°C | +22°C | +16°C | ||||
| Min. temperature | ||||||
| +3°C | -1°C | -13°C | ||||
| Max. temperature | ||||||
| +38°C | +37°C | +31°C | ||||
| Rainfall | ||||||
| 70 mm | 74 mm | 34 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Humidity | ||||||
| 63% | 66% | 62% | ||||
| Air pressure | ||||||
| 1006 HPa | 1010 HPa | 1015 HPa | ||||
| Sunny days | ||||||
| 4 | 5 | 9 | ||||
| Cloudy days | ||||||
| 7 | 7 | 8 | ||||
| Rainy days | ||||||
| 15 | 15 | 11 | ||||
| Snowy days | ||||||
| 0 | 0 | 1 | ||||
August weather is still as good as in July. It’s getting colder in August. From +24°C in the day, the average maximum temperature lowers to +22°C. Prepare for more rain. Average rainfall goes from 70 mm to 74 mm. Humidity rises from 63% to 66%. The average wind speed doesn’t change much during August, staying around 2 m/s. The good news is there are likely to be more sunny days in August, from 4 to 5.
September brings much the same weather, it remains good.
Wind
The average wind speed is 2 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Ulaanbaatar is gradually increasing during August, going from 2 m/s to 2 m/s over the course of the month.
Rain
How was the weather last August in Ulaanbaatar?
Climate Change over Years
The climate in Ulaanbaatar in August has not changed much over the last 43 years.
The average temperature was the lowest in 1985 (+4°C) and the highest in 2007 (+9°C). The driest year was 2017 with only 192 mm of rainfall, and the wettest year was 1984 with 432 mm.
FAQ
Is August a good time to visit Ulaanbaatar?
Can you sunbathe in Ulaanbaatar in August?
Is Ulaanbaatar rainy in August?
Is it sunny in Ulaanbaatar in August?
Monthly weather in Ulaanbaatar
Source of the data
For this page, we’ve looked at the typical weather in Ulaanbaatar, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.