St Konstantin weather in September 2025

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

  • 23°C maximum daytime temperature in September in St Konstantin23
    23°C max day temperature
  • 7 hours of sunshine per day
  • 4 days with some rainfall in September in St Konstantin4
    4 days with some rainfall
  • 13°C minimum night-time temperature in September in St Konstantin13
    13°C min night temperature
  • 12 hours of daylight per day in September in St Konstantin12
    12 hours of daylight per day
  • No heat & humidity in September in St Konstantin0
    No heat & humidity
  • 34 mm monthly rainfall in September in St Konstantin34
    34 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in St Konstantin5
    5 (Moderate) UV index
  • 22°C sea temperature in September in St Konstantin22
    22°C sea temperature

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The September weather guide for Bulgaria (St Konstantin) 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 St Konstantin in September?

Daytime temperatures usually reach 23°C in St Konstantin in September, falling to 13°C at night.

How sunny is it in St Konstantin in September?

There are normally 7 hours of bright sunshine each day in St Konstantin in September - that's 55% of daylight hours.

How warm is the sea around St Konstantin in September?

The average sea temperature around St Konstantin in September is 22°C.

Does it rain in St Konstantin in September?

There are usually 4 days with some rain in St Konstantin in September and the average monthly rainfall is 34mm.

St Konstantin September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:32 18:43
Monday, 15th September 2025 05:48 18:18
Tuesday, 30th September 2025 06:04 17:51

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