Irkutsk weather in September
September is a fair month to visit Irkutsk: highs of 15°C (60°F) and about 47 mm (1.9 in) of rain on average. Nights average 4°C (39°F) and cloud cover 65% (NASA POWER, 2001–2025 averages). It is the 4th wettest month of the year and the 5th warmest. Compared with August, it is cooler and drier; October brings highs of 5°C (42°F) and 21 mm (0.8 in) of rain.
Is September a good time to visit Irkutsk?
fair month Weather score 65/100.
September is a fair month in Irkutsk. The weather is usually best in May–Aug.
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Does it rain a lot in Irkutsk in September?
No, it is usually dry: about 47 mm (1.9 in) falls in an average September. It is the 4th wettest month of the year.
How warm is Irkutsk in September?
Days average 15°C (60°F) and nights 4°C (39°F).
Irkutsk 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
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