Graz weather in September 2025

Expect daytime maximum temperatures of 20°C in Graz, Austria in September based on long-term weather averages. There are 6 hours of sunshine per day on average with 11 days with some rainfall and typically 89 mm of rainfall in the month.

  • 20°C maximum daytime temperature in September in Graz20
    20°C max day temperature
  • 6 hours of sunshine per day
  • 11 days with some rainfall in September in Graz11
    11 days with some rainfall
  • 9°C minimum night-time temperature in September in Graz9
    9°C min night temperature
  • 13 hours of daylight per day in September in Graz13
    13 hours of daylight per day
  • No heat & humidity in September in Graz0
    No heat & humidity
  • 89 mm monthly rainfall in September in Graz89
    89 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Graz5
    5 (Moderate) UV index

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The September weather guide for Austria (Graz) 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 Graz in September?

Daytime temperatures usually reach 20°C in Graz in September, falling to 9°C at night.

How sunny is it in Graz in September?

There are normally 6 hours of bright sunshine each day in Graz in September - that's 44% of daylight hours.

Does it rain in Graz in September?

There are usually 11 days with some rain in Graz in September and the average monthly rainfall is 89mm.

Graz September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:18 18:38
Monday, 15th September 2025 05:36 18:10
Tuesday, 30th September 2025 05:56 17:40

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