Ulaanbaatar Weather in August

August marks the peak summer in Ulaanbaatar, but it is free from extremely high temperature. As one of the rainiest months, August has the relatively high rainfall and drizzles or thundershowers can be frequently seen. However, the short duration makes its influence on your trip and plan limited. Generally speaking, Ulaanbaatar weather in August is cozy and warm. Grasslands remain in their most luxuriant status, presenting a vibrant picture for visitors.

Warm Day & Cool Night

Ulaanbaatar experiences mild temperatures in August. On most days, the high temperature lies between 16 and 24 degrees Celsius (61 - 75 degrees Fahrenheit), even the highest ones stay below 30℃ (86℉). The low value swings around 10℃ (15℉), usually between 9 and 13℃ (48 - 55℉). Therefore, the weather of Ulaanbaatar in August is pleasantly warm during daytime and turns mildly cool at night, thus attracting many visitors to come here to escape summer heat of their places. Obvious temperature drop mostly takes place in the late August and the highest temperature decreases gradually to 20℃ (68℉) and lower.

High Rainfall but Short-lived

August is one of the rainiest months in Ulaanbaatar. Even though, the total monthly precipitation is relatively low compared with worldwide destinations, which is 86mm (3.4 in) on average from 16 rainy days. It falls in form of drizzles or thundershowers, usually in the afternoon. The climate of Ulaanbaatar in August is so changeable that the weather forecast might fail to predict the sudden thundershowers and you can see different weathers in one day, possibly from cloudy to rainy and then sunny. Whatever, you had better to prepare some raingear especially on the grassland where no shelter is available.

Luckily, the rainfall often lasts for a short time, only 1-2 hours in most time. Continuous rain for the whole day is rarely seen. After rain, the air tends to be cool and refreshing.

Ample but Decreasing Sunlight Hours

In August, a decreasing trend is seen in the average daylength and sunlight hours, but both remain ample and abundant for tourism. With the sunrise time at 05:42 - 06:21 and sunset time at 19:48 - 20:39, visitors are endowed with 14 hours on average to conduct day trips, of which you can enjoy bright sunshine for almost 8 hours per day. Though the UV index also drops a little to grade 7, the sunlight keeps pretty strong especially around noon and sunscreen products are still necessary. Overall, Ulaanbaatar climate in August can be described as sunny.

Averages for Ulaanbaatar Weather in August

High Temperature

23°C (73.4°F)

Low Temperature

9°C (48.2°F)

Rainfall

86 mm (3.4 in)

Sunrise

05:42 ~ 06:21

Sunset

19:48 ~ 20:39

Jan.Feb.Mar.Apr.May.Jun.Jul.Aug.Sep.Oct.Nov.Dec.

The times for sunrise and sunset are based on Ulaanbaatar.

One of the Best Months to Visit Ulaanbaatar

Undoubtedly, it is a good choice to visit Ulaanbaatar in August since it enjoys pleasant climate and stunning natural scenery. The moderate temperature allows visitors to conduct both outdoor and indoor activities pleasantly without feeling scorching hot even at noon nor quite cold at night. Furthermore, in sunny hours, the vast lush grassland, reflected with blue sky and white clouds, makes you feel like walking into the comic world. The cozy breeze ripples the rivers with branches along the riverside swaying slightly, blowing away your earthly annoyances.

What to Bring to Visit Ulaanbaatar in August?

Upper body: T-shirts with sun protective coats or long-sleeve T-shirts are suitable for most daytime in August in Ulaanbaatar. Thicker coats like leather coats, jackets, hoodies and trench coats should also be prepared to deal with the large day-night temperature difference and possible temperature drops caused by heavy rainfall.

Lower body: It is most suggested to wear loose jeans and thin sweatpants. Shorts or summer dresses suit only in urban areas. Remember to change them into long trousers after sunset or when visiting grassland.

Shoes: Light and comfortable sneakers are the best choice for traveling both to grasslands and urban attractions. It would be better if they are waterproof so as to deal with the rainy days.

Others: Sunscreen products like sunglasses, sunhats and sunblock cream remain necessary especially on the grassland with a few shades. Considering the mosquitoes and bugs everywhere in grazing districts, mosquito repellent pastes are also suggested since they are smaller and easier to bring.

Travel Recommendations and Tips for Ulaanbaatar in August

1. For vibrant grasslands, you can choose to visit Terelj National Park or Bogd Khan Uul National Park and they are of different characteristics. The former, being more popular and well-developed, is famous not only for its vast grassland, but also for its giant rock shaped like a turtle; while in the latter one which is closer to Ulaanbaatar (about 40km), you have the chance to see wild animals like deer, hares and boars.

Terelj National Park

Ongi Monastery

2. In late August, although most scenic spots get closed late at 20:00, the sun sets earlier before that. Visiting indoor attractions like Mongolian National Museum and Modern Art Gallery after sunset is less influenced since there are lights inside for you to appreciate the exhibitions. While, you had better visit the attractions like Gandan Monastery and Choijin Lama Temple earlier as the poor light after sunset makes the constructions less clearly seen.
3. If encountered with thunderstorms in downtown, you are suggested to find a shop as a temporarily shelter and wait till it passes; while on the grasslands, you can stay in cars for some moments. If the grassland is not muddy after rain, you can continue your travel as planned.

If you have decided to visit Ulaanbaatar in August 2026, then read our Best Private Mongolia Tours.

7-Day Ulaanbaatar Weather Forecast