Ust’-Ilimsk Weather in December
What's the weather like in Ust’-Ilimsk (Irkutsk) in December 2025?
The climate in Ust’-Ilimsk during December can be summarized as very cold and dry.
December is in the winter in Ust’-Ilimsk and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a freezing -16°C (4°F), whilst at night -27°C (-17°F) is normal.
| Daytime temperature | -15.7°C 3.8°F |
|---|---|
| Nightly temperature | -27°C -16.5°F |
| Average temperature | -21.3°C -6.3°F |
| Daily sunshine | 1.5 hrs |
| Avg rainfall | 23 mm 0.9 ins |
| Rainy days | 19 days |
| Sea temperature | 4.6°C 40.2°F |
| Humidity | 100% |
| Windspeed | 4.3kph 3 mph |
On average December is the 5th driest month of the year in Ust’-Ilimsk with around 23mm 0.9 inches of rain making it a dry time to visit. This rainfall is typically spread over 19 days, although this may vary considerably.
On the flip side this corresponds to an average of 1.5 hours of sunshine per day.
December temperatures in Ust’-Ilimsk
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 Ust’-Ilimsk in December 2025.
Other monthly averages
Best places to visit in December
Ust’-Ilimsk weather stats
| Hottest month: | July | 24.5°C 76.1°F |
|---|---|---|
| Driest month: | February | 13mm 0.5ins |
| Sunniest month: | June | 10.6hrs |
| Coldest month: | January | -18.1°C -0.6°F |
| Wettest month: | July | 66mm 2.6ins |
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