Slovenia weather in September 2025

Expect 21°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Slovenia in September. Check more long-term weather averages for Slovenia in September before you book your next holiday to Slovenia in 2025/2026.

• 21
  21°C max day temperature
• 6
  6 hours of sunshine per day
• 12
  12 days with some rainfall
• 11
  11°C min night temperature
• 13
  13 hours of daylight per day
• 0
  No heat & humidity
• 127
  127 mm of monthly rainfall
• 5
  5 (Moderate) UV index

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The September weather guide for Slovenia (Ljubljana) 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.

Top Slovenia destinations

Below are average maximum temperatures at popular countries, regions and places in Slovenia in September. Select a holiday destination to see more weather parameters.

• 24
  Portoroz
• 21
  Ljubljana
• 20
  Maribor
• 17
  Bled
• 17
  Bohinj
• 14
  Kranjska Gora

All Slovenia destinations

• Bled
• Bohinj
• Bovec
• Celje
• Kranjska Gora
• Ljubljana
• Maribor
• Portoroz
• Ptuj

Metric (°C / mm)  |  Imperial (°F / inches)

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Slovenia September sunrise & sunset times

Browse the sunrise and sunset times for Slovenia in September 2025. Select a month to view Slovenia sunrise and sunset times for the next 12 months. The Slovenia sunrise and sunset times shown below are for Ljubljana.

JanFebMarAprMayJunJulAugSepOctNovDec

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