Celje weather in September 2025

Expect daytime maximum temperatures of 21°C in Celje, Slovenia in September based on long-term weather averages. There are 6 hours of sunshine per day on average with 12 days with some rainfall and typically 113 mm of rainfall in the month.

  • 21°C maximum daytime temperature in September in Celje21
    21°C max day temperature
  • 6 hours of sunshine per day
  • 12 days with some rainfall in September in Celje12
    12 days with some rainfall
  • 10°C minimum night-time temperature in September in Celje10
    10°C min night temperature
  • 13 hours of daylight per day in September in Celje13
    13 hours of daylight per day
  • No heat & humidity in September in Celje0
    No heat & humidity
  • 113 mm monthly rainfall in September in Celje113
    113 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Celje5
    5 (Moderate) UV index

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The September weather guide for Slovenia (Celje) 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 Celje in September?

Daytime temperatures usually reach 21°C in Celje in September, falling to 10°C at night.

How sunny is it in Celje in September?

There are normally 6 hours of bright sunshine each day in Celje in September - that's 50% of daylight hours.

Does it rain in Celje in September?

There are usually 12 days with some rain in Celje in September and the average monthly rainfall is 113mm.

Celje September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:19 18:37
Monday, 15th September 2025 05:37 18:10
Tuesday, 30th September 2025 05:56 17:41

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