Irkutsk Oblast weather in January
January is one of the least pleasant months in Irkutsk Oblast: highs of -17°C (2°F) and about 11 mm (0.4 in) of rain on average. Nights average -25°C (-14°F) and cloud cover 59% (NASA POWER, 2001–2025 averages). It is the 2nd driest month of the year and the coolest. Compared with December, it is cooler and drier; February brings highs of -13°C (9°F) and 9 mm (0.4 in) of rain.
Figures are long-term averages for Irkutsk, the largest city in Irkutsk Oblast. See below for other places.
Is January a good time to visit Irkutsk Oblast?
least pleasant month Weather score 46/100.
January is one of the least pleasant months for weather in Irkutsk Oblast. For better conditions, consider May–Aug.
Does it rain a lot in Irkutsk Oblast in January?
No, it is usually dry: about 11 mm (0.4 in) falls in an average January. It is the 2nd driest month of the year.
How warm is Irkutsk Oblast in January?
Days average -17°C (2°F) and nights -25°C (-14°F).
Irkutsk Oblast weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | -17°C (2°F) | -25°C (-14°F) | 11 mm | 59% | least pleasant |
| February | -13°C (9°F) | -23°C (-10°F) | 9 mm | 56% | least pleasant |
| March | -2°C (28°F) | -14°C (8°F) | 13 mm | 62% | least pleasant |
| April | 9°C (47°F) | -3°C (26°F) | 22 mm | 69% | least pleasant |
| May | 16°C (61°F) | 3°C (38°F) | 41 mm | 67% | best |
| June | 24°C (76°F) | 12°C (53°F) | 57 mm | 68% | best |
| July | 26°C (80°F) | 14°C (58°F) | 85 mm | 67% | best |
| August | 23°C (74°F) | 11°C (53°F) | 82 mm | 64% | best |
| September | 15°C (60°F) | 4°C (39°F) | 47 mm | 65% | fair |
| October | 5°C (42°F) | -4°C (25°F) | 21 mm | 70% | least pleasant |
| November | -6°C (22°F) | -13°C (8°F) | 15 mm | 73% | least pleasant |
| December | -15°C (6°F) | -22°C (-8°F) | 16 mm | 67% | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across Irkutsk Oblast in January
Weather can differ a lot within Irkutsk Oblast: coasts, hills and mountains each have their own climate.
| Place | High | Low | Rain | Weather |
|---|---|---|---|---|
| Irkutsk | -17°C (2°F) | -25°C (-14°F) | 11 mm | least pleasant |
| Bratsk | -18°C (-1°F) | -26°C (-15°F) | 20 mm | least pleasant |
| Angarsk | -15°C (4°F) | -24°C (-12°F) | 11 mm | least pleasant |
| Ust’-Ilimsk | -19°C (-3°F) | -27°C (-16°F) | 25 mm | least pleasant |
| Usol’ye-Sibirskoye | -17°C (1°F) | -25°C (-14°F) | 12 mm | least pleasant |
| Cheremkhovo | -17°C (2°F) | -25°C (-12°F) | 12 mm | least pleasant |
| Tulun | -16°C (3°F) | -24°C (-12°F) | 16 mm | least pleasant |
| Ust’-Kut | -20°C (-3°F) | -27°C (-17°F) | 26 mm | least pleasant |
| Shelekhov | -15°C (4°F) | -24°C (-11°F) | 13 mm | least pleasant |
| Sayansk | -16°C (2°F) | -25°C (-12°F) | 14 mm | least pleasant |
| Nizhneudinsk | -14°C (7°F) | -22°C (-8°F) | 15 mm | least pleasant |
| Tayshet | -15°C (4°F) | -23°C (-10°F) | 23 mm | least pleasant |