The climate in Ulaanbaatar during September can be summarized as cool and reasonably dry.
September is in the fall / autumn in Ulaanbaatar and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a cool 15°C (59°F), whilst at night 1°C (34°F) is normal.
|Daytime temperature||14.9°C 58.7°F|
|Nightly temperature||1°C 33.7°F|
|Average temperature||7.9°C 46.2°F|
|Daily sunshine||9 hrs|
|Avg rainfall||43 mm 1.7 ins|
|Rainy days||9 days|
|Sea temperature||15.2°C 59.3°F|
|Windspeed||10.4kph 7 mph|
On average September is the 4th wettest month of the year in Ulaanbaatar with around 43mm 1.7 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 9 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Ulaanbaatar in September 2023.
Best places to visit in September
|Hottest month:||July||22°C 71.6°F|
|Driest month:||January||3mm 0.1ins|
|Coldest month:||January||-16.2°C 2.8°F|
|Wettest month:||August||86mm 3.4ins|