Bialystok weather in September 2025

Expect daytime maximum temperatures of 17°C in Bialystok in September based on long-term weather averages. There are 5 hours of sunshine per day on average with 13 days with some rainfall and typically 53 mm of rainfall in the month.

  • 17°C maximum daytime temperature in September in Bialystok17
    17°C max day temperature
  • 5 hours of sunshine per day
  • 13 days with some rainfall in September in Bialystok13
    13 days with some rainfall
  • 8°C minimum night-time temperature in September in Bialystok8
    8°C min night temperature
  • 13 hours of daylight per day in September in Bialystok13
    13 hours of daylight per day
  • No heat & humidity in September in Bialystok0
    No heat & humidity
  • 53 mm monthly rainfall in September in Bialystok53
    53 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Bialystok4
    4 (Moderate) UV index

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The September weather guide for Poland (Bialystok) 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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More about Poland

How warm is it in Bialystok in September?

Daytime temperatures usually reach 17°C in Bialystok in September, falling to 8°C at night.

How sunny is it in Bialystok in September?

There are normally 5 hours of bright sunshine each day in Bialystok in September - that's 40% of daylight hours.

Does it rain in Bialystok in September?

There are usually 13 days with some rain in Bialystok in September and the average monthly rainfall is 53mm.

Bialystok September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 04:37 18:16
Monday, 15th September 2025 05:01 17:43
Tuesday, 30th September 2025 05:27 17:06

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