Irkutsk weather in September 2025

Expect 15°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Irkutsk in September. Check more long-term weather averages for Irkutsk in September before you book your next holiday to Russia (Central Asia) in 2025/2026.

  • 15°C maximum daytime temperature in September in Irkutsk15
    15°C max day temperature
  • 6 hours of sunshine per day
  • 11 days with some rainfall in September in Irkutsk11
    11 days with some rainfall
  • 3°C minimum night-time temperature in September in Irkutsk3
    3°C min night temperature
  • 13 hours of daylight per day in September in Irkutsk13
    13 hours of daylight per day
  • No heat & humidity in September in Irkutsk0
    No heat & humidity
  • 55 mm monthly rainfall in September in Irkutsk55
    55 mm of monthly rainfall
  • UV (maximum) index 3 (Moderate) in September in Irkutsk3
    3 (Moderate) UV index

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The September weather guide for Russia (Central Asia) (Irkutsk) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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How warm is it in Irkutsk in September?

Daytime temperatures usually reach 15°C in Irkutsk in September, falling to 3°C at night.

How sunny is it in Irkutsk in September?

There are normally 6 hours of bright sunshine each day in Irkutsk in September - that's 50% of daylight hours.

Does it rain in Irkutsk in September?

There are usually 11 days with some rain in Irkutsk in September and the average monthly rainfall is 55mm.

Irkutsk September sunrise & sunset times

Browse the sunrise and sunset times for Irkutsk in September 2025. Select a month to view Irkutsk sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:14 19:51
Monday, 15th September 2025 06:37 19:18
Tuesday, 30th September 2025 07:02 18:43

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