Slovenia in september: average Weather, Temperature and Climate, Where to go?
Weather in Slovenia in september 2025
In this section, check out the weather forecast for september for most popular cities in Slovenia. These predictions are probabilities for the month of september from weather reports for over 10 years. The percentage indicates the probability of having the weather mentioned.
Average weather in september in Ljubljana
good weather
Weather at 6am
58°F
Clear/Sunny
42% of time
20%
16%
11%
Weather at 12pm
68°F
Clear/Sunny
40% of time
27%
19%
8%
Weather at 6pm
56°F
Clear/Sunny
39% of time
20%
18%
14%
Weather at 3am
54°F
39%
26%
15%
12%
More information about the weather in Ljubljana in september
Where to go in Slovenia in september?
Where to go in Slovenia in september: destination map
perfect weather
good
tolerable
bad
very bad
Where should you go in Slovenia in september when it comes to the weather?
Remember:
The climate in Slovenia in september is good across the board.
Although it is not perfect the weather in Slovenia in september is, on average, quite good averywhere: in Koper, Portorož, Maribor, Kranjska Gora, Ljubljana, Piran, Bovec and Bled. I allows to appreciate vacation in these areas. And even why not take a little time to enjoy the weather for... just be relax!
Climate in Slovenia in september
Climate in Ljubljana in september
In the month of september, maximum temperature is 70°F and minimum temperature is 58°F (for an average temperature of 63°F). The climate good here in the month of september. With 6.2in over 6 days, rainfall can happen for your stay. But this is moderate and you will not be too bothered by it.
With good weather conditions, september is a good time to go in that area in Slovenia.
| September | |||
| Average temperature | 63°F | ||
| Highest temperature | 70°F | ||
| Lowest temperature | 58°F | ||
| Rainfall | 6.2in | ||
| Number of days with rainfall | 6 day(s) (21%) | ||
| Humidity | 89% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 36% | ||
| Length of day | 12:33 | ||
| Our opinion at whereandwhen.net | good |
Climate in Maribor in september
In september, maximum temperature is 72°F and minimum temperature is 58°F (for an average temperature of 65°F). The climate quite nice here in this month. With 7.4in over 9 days, rainfall can happen for your stay. But this is reasonably and you will not be too bothered by it.
With good weather conditions, september is a good month to go there.
| September | |||
| Average temperature | 65°F | ||
| Highest temperature | 72°F | ||
| Lowest temperature | 58°F | ||
| Rainfall | 7.4in | ||
| Number of days with rainfall | 9 day(s) (29%) | ||
| Humidity | 87% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 37% | ||
| Length of day | 12:33 | ||
| Our opinion at whereandwhen.net | good |
Climate in Piran in september
In the month of september, maximum temperature is 76°F and minimum temperature is 63°F (for an average temperature of 70°F). The climate quite nice in that locality in the month of september. With 9.4in over 9 days, you risk getting wet slightly for your vacations. But this is reasonably and it is only of temporary showers.
With a good weather, september is a good time to go in this city.
| September | |||
| Average temperature | 70°F | ||
| Highest temperature | 76°F | ||
| Lowest temperature | 63°F | ||
| Sea temperature | 74°F | ||
| Rainfall | 9.4in | ||
| Number of days with rainfall | 9 day(s) (31%) | ||
| Humidity | 79% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 27% | ||
| Length of day | 12:33 | ||
| Our opinion at whereandwhen.net | good |
Climate in Ankaran in september
In the month of september, the mean temperature in Ankaran is 70°F (maximum temperature is 76°F and minimum temperature is 63°F). The climate is pleasant around this city in september. With 9.4in over 9 days, you risk getting wet slightly for your vacations. But this is pretty moderate and you will not be too bothered by it.
With a good climate, september is a good time to go in this city in Slovenia.
| September | |||
| Average temperature | 70°F | ||
| Highest temperature | 76°F | ||
| Lowest temperature | 63°F | ||
| Sea temperature | 74°F | ||
| Rainfall | 9.4in | ||
| Number of days with rainfall | 9 day(s) (31%) | ||
| Humidity | 79% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 27% | ||
| Length of day | 12:32 | ||
| Our opinion at whereandwhen.net | good |
Climate in Bled in september
In the month of september, the mean temperature in Bled is 59°F (maximum temperature is 67°F and minimum temperature is 52°F). The climate is quite fresh in that area in this month, but it is livable when dressing hot. With 10.1in over 11 days, rain may occur for your holidays. But this is rather reasonably and you will not be too bothered by it.
With good weather conditions, september is an advisable month to go in this city.
| September | |||
| Average temperature | 59°F | ||
| Highest temperature | 67°F | ||
| Lowest temperature | 52°F | ||
| Rainfall | 10.1in | ||
| Number of days with rainfall | 11 day(s) (35%) | ||
| Humidity | 89% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 38% | ||
| Length of day | 12:33 | ||
| Our opinion at whereandwhen.net | tolerable |
All cities in Slovenia in september
| Ljubljana in september | good weather |
| Maribor in september | good weather |
| Piran in september | good weather |
| Ankaran in september | good weather |
| Bled in september | tolerable weather |
| Bovec in september | good weather |
| Izola in september | good weather |
| Jezersko in september | good weather |
| Koper in september | good weather |
| Kostabona in september | good weather |
| Kozjanski park (Kozjansko Regional Park) in september | good weather |
| Kranjska Gora in september | tolerable weather |
| Bohinj Lake (Bohinjsko jezero) in september | good weather |
| Mojstrana in september | tolerable weather |
| Olimje in september | good weather |
| Portorož in september | good weather |
| Predjama in september | good weather |
| Škofja Loka in september | good weather |
| Solcava in september | good weather |
| Stanjel in september | good weather |
| Triglav National Park (Triglavski narodni park) in september | tolerable weather |
| Brežice in september | good weather |
| Celje in september | good weather |
| Idrija in september | good weather |
| Ilirska Bistrica in september | good weather |
| Kamnik in september | good weather |
| Kranj in september | good weather |
| Kuzma in september | good weather |
| Lendava in september | good weather |
| Litija in september | good weather |
| Logatec in september | good weather |
| Murska Sobota in september | good weather |
| Nova Gorica in september | good weather |
| Novo Mesto in september | good weather |
| Osilnica in september | good weather |
| Postojna in september | good weather |
| Prevalje in september | good weather |
| Ptuj in september | good weather |
| Radlje ob Dravi in september | good weather |
| Ribnica in september | good weather |
| Rogaška Slatina in september | good weather |
| Sevnica in september | good weather |
| Sežana in september | good weather |
| Slovenske Konjice in september | good weather |
| Tolmin in september | good weather |
| Trbovlje in september | good weather |
| Velenje in september | good weather |
Weather data for Slovenia in september:
Weather data for Slovenia in september is derived from an average of the weather forecast since 2009 in Slovenia. There is a margin of error and these forecasts are to be considered as general information only. The weather in Slovenia can vary slightly from year to year, but these predictions should limit surprises. So you can pack your bags and check when is the best time to go to Slovenia.