Bialystok weather in September 2025

Expect 63°F daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Bialystok in September. Check more long-term weather averages for Bialystok in September before you book your next holiday to Poland in 2025/2026.

  • 63°F maximum daytime temperature in September in Bialystok63
    63°F max day temperature
  • 5 hours of sunshine per day
  • 13 days with some rainfall in September in Bialystok13
    13 days with some rainfall
  • 46°F minimum night-time temperature in September in Bialystok46
    46°F 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
  • 2.1 inches monthly rainfall in September in Bialystok2.1
    2.1 inches of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Bialystok4
    4 (Moderate) UV index

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Bialystok by month

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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)  |  Imperial (°F)

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More about Poland

How warm is it in Bialystok in September?

Daytime temperatures usually reach 63°F in Bialystok in September, falling to 46°F 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 2.1 inches.

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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