Bayan-Ulaan Weather in December
What's the weather like in Bayan-Ulaan (Övörhangay) in December 2025?
The climate in Bayan-Ulaan during December can be summarized as very cold and very dry.
December is in the winter in Bayan-Ulaan and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a freezing -9°C (16°F), whilst at night -22°C (-7°F) is normal.
| Daytime temperature | -9.2°C 15.5°F |
|---|---|
| Nightly temperature | -21.9°C -7.3°F |
| Average temperature | -15.5°C 4.1°F |
| Daily sunshine | 7 hrs |
| Avg rainfall | 2 mm 0.1 ins |
| Rainy days | 4 days |
| Sea temperature | 10.6°C 51.1°F |
| Humidity | 66% |
| Windspeed | 8.3kph 5 mph |
On average December is the 2nd driest month of the year in Bayan-Ulaan with around 2mm 0.1 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 7 hours of sunshine per day.
December temperatures in Bayan-Ulaan
December rainfall
December 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 December 2025.
Other monthly averages
Best places to visit in December
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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