Constanta weather in September 2025

Expect 22°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Constanta in September. Check more long-term weather averages for Constanta in September before you book your next holiday to Romania in 2025/2026.

  • 22°C maximum daytime temperature in September in Constanta22
    22°C max day temperature
  • 6 hours of sunshine per day
  • 5 days with some rainfall in September in Constanta5
    5 days with some rainfall
  • 14°C minimum night-time temperature in September in Constanta14
    14°C min night temperature
  • 12 hours of daylight per day in September in Constanta12
    12 hours of daylight per day
  • No heat & humidity in September in Constanta0
    No heat & humidity
  • 30 mm monthly rainfall in September in Constanta30
    30 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Constanta5
    5 (Moderate) UV index
  • 21°C sea temperature in September in Constanta21
    21°C sea temperature

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The September weather guide for Romania (Constanta) 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 Constanta in September?

Daytime temperatures usually reach 22°C in Constanta in September, falling to 14°C at night.

How sunny is it in Constanta in September?

There are normally 6 hours of bright sunshine each day in Constanta in September - that's 47% of daylight hours.

How warm is the sea around Constanta in September?

The average sea temperature around Constanta in September is 21°C.

Does it rain in Constanta in September?

There are usually 5 days with some rain in Constanta in September and the average monthly rainfall is 30mm.

Constanta September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:28 18:42
Monday, 15th September 2025 05:45 18:16
Tuesday, 30th September 2025 06:02 17:48

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