City in Irkutsk Oblast, Russia
Irkutsk weather by month and the best time to visit
When to go to Irkutsk
Late February–March offers clear Baikal ice; July–August is warm for hiking. January is -20°C or colder; May–June can be foggy and rainy.
Irkutsk weather by month
Average daily high, rainfall and conditions.
- Jan-16°11 mm
- Feb-12°9 mm
- Mar-2°13 mm
- Apr9°22 mm
- May17°41 mm
- Jun25°57 mm
- Jul27°85 mm
- Aug24°82 mm
- Sep16°47 mm
- Oct6°21 mm
- Nov-5°15 mm
- Dec-14°16 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | -16°C3°F | -24°C-12°F | 11 mm | 96% | Freezing |
| February | -12°C11°F | -22°C-8°F | 9 mm | 95% | Freezing |
| March | -2°C29°F | -13°C9°F | 13 mm | 87% | Freezing |
| April | 9°C49°F | -2°C28°F | 22 mm | 64% | Cold |
| May | 17°C63°F | 4°C39°F | 41 mm | 61% | Cool |
| June | 25°C77°F | 12°C54°F | 57 mm | 61% | Pleasant |
| July | 27°C81°F | 15°C59°F | 85 mm | 63% | Pleasant |
| August | 24°C75°F | 12°C54°F | 82 mm | 68% | Pleasant |
| September | 16°C61°F | 5°C40°F | 47 mm | 72% | Cool |
| October | 6°C43°F | -3°C26°F | 21 mm | 76% | Cold |
| November | -5°C23°F | -13°C9°F | 15 mm | 85% | Freezing |
| December | -14°C7°F | -22°C-7°F | 16 mm | 94% | Freezing |
Best months across Russia
| Place | Best months | Warmest month |
|---|---|---|
| Moscow | May–Jun, Sep | Jul (24°C) |
| Saint Petersburg | Jun–Aug | Jul (22°C) |
| Kazan | May–Sep | Jul (25°C) |
| Sochi | May–Sep | Aug (30°C) |
| Kaliningrad | Jun–Sep | Jul (23°C) |
| Irkutsk | Feb–Mar, Jul–Sep | Jul (27°C) |
| Yekaterinburg | Jun–Sep | Jul (23°C) |
| Vladivostok | May–Jun, Sep–Oct | Aug (24°C) |
| Murmansk | Sep–Mar | Jul (17°C) |
| Novosibirsk | Jun–Sep | Jul (25°C) |
| Nizhny Novgorod | May–Sep | Jul (24°C) |
| Olkhon Island | Feb–Mar, Jul–Sep | Jul (25°C) |
| Petropavlovsk-Kamchatsky | Feb–Mar, Jul–Sep | Aug (17°C) |
Quick answers
What is the best month to visit Irkutsk?
Feb–Mar, Jul–Sep. Late February–March offers clear Baikal ice; July–August is warm for hiking. January is -20°C or colder; May–June can be foggy and rainy.
When is the rainy season in Irkutsk?
Rain peaks in July with about 85 mm. No month averages 150 mm or more.
What is the hottest month in Irkutsk?
July, with average highs of 27°C (81°F).
How cold does Irkutsk get?
The coolest nights are in January, averaging -24°C (-12°F).
More about Irkutsk
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Sources
Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Temperatures are adjusted by 0.8°C for the city's elevation. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.