Irkutsk weather in October
October in Irkutsk: cold, dry, with clean air — a good time to visit.
#7 of 12 months in Irkutsk · #481 of 604 destinations to visit in October · comfort 64/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Irkutsk climate normals — October
| Daytime high | 8°C / 46°F | 🧥 cold |
|---|---|---|
| Nighttime low | -2°C / 29°F | |
| Feels like (high) | 4°C / 39°F | |
| Rainfall | 17 mm / 0.7 in | ☀️ dry |
| Rainy days | 6 days | |
| Humidity | 75% | 💦 very humid |
| Dew point | -1°C / 30°F | |
| Sunshine | 7.8 h/day | |
| Daylight | 10.6 h | |
| Wind | 14 km/h / 9 mph | |
| Snowfall | 6.2 cm / 2.4 in | |
| Air quality (US AQI) | 27 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Irkutsk in October — FAQ
- Is October a good time to visit Irkutsk?
- October in Irkutsk: cold, dry, with clean air — a good time to visit. It ranks #7 of 12 months for Irkutsk on SeasonMap's comfort score (64/100).
- What is the weather like in Irkutsk in October?
- In October, Irkutsk averages a daily high of 7.5°C and a low of -1.6°C, with about 16.7 mm of rain over roughly 5.6 rainy days.
- What is the air quality in Irkutsk in October?
- Irkutsk has a mean US Air Quality Index of about 27 in October.
- Does it snow in Irkutsk in October?
- Irkutsk sees roughly 6.2 cm of snowfall in October.