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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.
- 2121°C max day temperature
- 6 hours of sunshine per day
- 1212 days with some rainfall
- 1111°C min night temperature
- 1313 hours of daylight per day
- 0No heat & humidity
- 127127 mm of monthly rainfall
- 55 (Moderate) UV index
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Recommended for Slovenia
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.
All Slovenia destinations
Metric (°C / mm) | Imperial (°F / inches)
More about Slovenia
How hot is it in Slovenia in September?
Daytime temperatures usually reach 21°C in Ljubljana, Slovenia in September, falling to 11°C at night.
How sunny is it in Slovenia in September?
There are normally 6 hours of bright sunshine each day in Ljubljana, Slovenia in September - that's 46% of daylight hours.
Does it rain in Slovenia in September?
There are usually 12 days with some rain in Ljubljana, Slovenia in September and the average monthly rainfall is 127mm.
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
Date | Sunrise times | Sunset times |
---|---|---|
Monday, 1st September 2025 | 05:23 | 18:40 |
Monday, 15th September 2025 | 05:40 | 18:13 |
Tuesday, 30th September 2025 | 05:59 | 17:44 |
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