Iasi weather in September 2025

Expect 23°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Iasi in September. Check more long-term weather averages for Iasi in September before you book your next holiday to Romania in 2025/2026.

  • 23°C maximum daytime temperature in September in Iasi23
    23°C max day temperature
  • 7 hours of sunshine per day
  • 8 days with some rainfall in September in Iasi8
    8 days with some rainfall
  • 11°C minimum night-time temperature in September in Iasi11
    11°C min night temperature
  • 13 hours of daylight per day in September in Iasi13
    13 hours of daylight per day
  • No heat & humidity in September in Iasi0
    No heat & humidity
  • 45 mm monthly rainfall in September in Iasi45
    45 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Iasi5
    5 (Moderate) UV index

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The September weather guide for Romania (Iasi) 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 hot is it in Iasi in September?

Daytime temperatures usually reach 23°C in Iasi in September, falling to 11°C at night.

How sunny is it in Iasi in September?

There are normally 7 hours of bright sunshine each day in Iasi in September - that's 54% of daylight hours.

Does it rain in Iasi in September?

There are usually 8 days with some rain in Iasi in September and the average monthly rainfall is 45mm.

Iasi September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:29 18:49
Monday, 15th September 2025 05:47 18:21
Tuesday, 30th September 2025 06:07 17:51

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