Slovenia weather in September
Slovenia in September averages 17°C (62°F), 159 mm of rain and 5.9 hours of sun a day. It is one of the wetter months of the year here.
Of the twelve months in Slovenia, September is the fourth warmest, the wettest and the sixth sunniest.
- Average temp
- 17°C (62°F)
12–22°C · 53–71°F
- Rainfall
- 159 mm
A wet month
- Sunshine
- 5.9 h
hours per day
What is Slovenia like in September?
Daytime
Days are mild.
Rain
Expect frequent rain — this is a wet month.
Evening
Evenings are cooler. A layer helps after sunset.
What should I pack for Slovenia in September?
A proper waterproof, not a folding umbrella
159 mm in the month usually arrives as heavy bursts that an umbrella will not cover.
A dry bag for phone and documents
Worth it for one downpour caught between the taxi and the door.
A warm mid-layer
Nights drop to around 12°C (53°F).
September compared with August and October
September in Slovenia is 4.9°C cooler than August and 35 mm wetter than it, which averages 22°C (71°F).
September in Slovenia is 4.8°C warmer than October and about as wet as it, which averages 12°C (54°F).
Daylight in Slovenia in September
On 15 September the sun is up for 12 hours 32 minutes in Slovenia, rising about 06:38 and setting about 19:10 local time.
September ends 1 hour 33 minutes shorter than it begins, so the last week of the month is a different length of day from the first.
That is 3 hours 13 minutes short of June, the longest-lit month here.
Travel guides for Slovenia
What to read before you book.
Slovenia weather by month
TemperatureRainfall
How September compares with the rest of the year
September is highlighted. Every other month links to its own page.
| Month | Average | Rainfall |
|---|---|---|
| January | 1°C / 34°F | 67 mm |
| February | 3°C / 37°F | 85 mm |
| March | 7°C / 45°F | 82 mm |
| April | 12°C / 53°F | 96 mm |
| May | 16°C / 61°F | 114 mm |
| June | 20°C / 68°F | 126 mm |
| July | 22°C / 72°F | 121 mm |
| August | 22°C / 71°F | 124 mm |
| September | 17°C / 62°F | 159 mm |
| October | 12°C / 54°F | 150 mm |
| November | 7°C / 44°F | 138 mm |
| December | 2°C / 35°F | 105 mm |
Similar weather in September
Other destinations whose September averages sit close to this one.
Check another month
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FAQs about Slovenia in September
September climate averages for Slovenia, 1991–2020.
Slovenia averages 17°C (62°F) in September, ranging from about 12°C (53°F) at night to 22°C (71°F) in the afternoon. That is a 1991–2020 average, so an individual week can run either side of it.
Yes, a lot. September brings about 159 mm, which makes it one of the wetter months here — expect heavy bursts rather than all-day drizzle.
Yes. September averages 17°C (62°F) against 12°C (54°F) in October — 4.8°C warmer.
September is 4.9°C cooler than August, and 35 mm wetter.
Yes. September falls inside the most comfortable stretch of the year here, April to September, on temperature and rainfall together.
About 5.9 hours of sun a day on the 1991–2020 average.
This page does not show today's weather. It is a 1991–2020 climate normal from Meteostat — a long-run average of what September is usually like, which is what you want when booking months ahead. For today or the coming week, check a live forecast.
About 12 hours 32 minutes of daylight in mid-September, against 15 hours 45 minutes in June and 8 hours 39 minutes in December.
On 15 September, sunrise is about 06:38 and sunset about 19:10 local time. Both shift across the month — the month ends 1 hour 33 minutes shorter than it starts.
