Bayan-Ulaan Weather in September
What's the weather like in Bayan-Ulaan (Övörhangay) in September 2025?
The climate in Bayan-Ulaan during September can be summarized as cool and dry.
September is in the fall / autumn in Bayan-Ulaan and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a cool 14°C (57°F), whilst at night -0°C (32°F) is normal.
| Daytime temperature | 13.7°C 56.7°F |
|---|---|
| Nightly temperature | -0.1°C 31.8°F |
| Average temperature | 6.8°C 44.2°F |
| Daily sunshine | 9.5 hrs |
| Avg rainfall | 26 mm 1 ins |
| Rainy days | 8 days |
| Sea temperature | 15.6°C 60.1°F |
| Humidity | 55% |
| Windspeed | 10.4kph 7 mph |
On average September is the 5th wettest month of the year in Bayan-Ulaan with around 26mm 1 inches of rain making it a dry time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.
On the flip side this corresponds to an average of 9.5 hours of sunshine per day.
September temperatures in Bayan-Ulaan
September rainfall
September hourly sunshine
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 Bayan-Ulaan in September 2025.
Other monthly averages
Best places to visit in September
Bayan-Ulaan weather stats
| Hottest month: | July | 19.3°C 66.7°F |
|---|---|---|
| Driest month: | January | 1mm 0ins |
| Sunniest month: | January | 7.7hrs |
| Coldest month: | January | -11.3°C 11.7°F |
| Wettest month: | July | 87mm 3.4ins |
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