Bratislava weather in September 2026

Expect daytime maximum temperatures of 21°C in Bratislava, Slovakia in September based on long-term weather averages. There are 6 hours of sunshine per day on average with typically 44 mm of rainfall in the month.

  • 21°C maximum daytime temperature in September in Bratislava21
    21°C max day temperature
  • 6 hours of sunshine per day
  • 9 days with some rainfall in September in Bratislava9
    9 days with some rainfall
  • 11°C minimum night-time temperature in September in Bratislava11
    11°C min night temperature
  • 13 hours of daylight per day in September in Bratislava13
    13 hours of daylight per day
  • No heat & humidity in September in Bratislava0
    No heat & humidity
  • 44 mm monthly rainfall in September in Bratislava44
    44 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Bratislava4
    4 (Moderate) UV index

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