Portorož in september: average Weather, Temperature and Climate
Weather in Portorož in september 2025
The weather in Portorož in the month of september comes from statistical datas on the past years. You can view the weather statistics for the whole month, but also navigating through the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
good weather UV index: 6
Weather at 6am
63°F
Clear/Sunny
48% of time
24%
13%
12%
Weather at 12pm
76°F
Clear/Sunny
44% of time
22%
19%
14%
Weather at 6pm
67°F
Clear/Sunny
48% of time
19%
19%
14%
Weather at 3am
63°F
49%
22%
19%
9%
Evolution of daily average temperature and precipitation in Portorož in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Portorož in september.
The climate of Portorož in september is good
In september in Portorož, the climate is wet (with 9.4in of rainfall over 9 days). It should be noted a worsening from the previous month since in august there is an average of 5.9in of precipitation over 7 days.
The climate good here the month of september. The high seasonal norm is 76°F. The minimum is 63°F. Thus, the mean temperature average in september in Portorož is 70°F. Note that seasonal normals are in contrast with those observed in Portorož in september with a maximum record of 92°F in 2021 and a minimum record of 49°F in 2017.
In september in Portorož, the days on average last 12:32. Sunrise is at 05:44 and sunset is at 18:16.
With good weather conditions, september is a good time to go in this locality in Slovenia.
Seasonal average climate and temperature of Portorož in september
Check below seasonal norms These statistics are compiled from the weather statements earlier years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 70°F | ||||
| Highest temperature | 76°F | ||||
| Lowest temperature | 63°F | ||||
| Highest record temperature | 92°F (2021) | ||||
| Lowest record temperature | 49°F (2017) | ||||
| Number of days at +86°F | 2 day(s) (7%) | ||||
| Number of days at +65°F | 29 day(s) (97%) | ||||
| Sea temperature | |||||
| Average sea temperature | 74°F | ||||
| Lowest sea temperature | 69°F | ||||
| Highest sea temperature | 80°F | ||||
| Wind | |||||
| Wind speed | 14km/h | ||||
| Wind temperature | 63°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 9.4in | ||||
| Number of days with rainfall | 9 day(s) (31%) | ||||
| Record daily rainfall | 4.8in (2010) | ||||
| Other climate data | |||||
| Humidity | 79% | ||||
| Visibility | 9.37km | ||||
| Cloud cover | 27% | ||||
| UV index | 6 | ||||
| Daily sunshine hours | 12 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:44 | ||||
| Time of sunset | 18:16 | ||||
| Length of day | 12:32 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last september?
Here is the day by day recorded weather in Portorož in september 2024:
74°F to 94°F
74°F to 92°F
70°F to 86°F
68°F to 86°F
68°F to 86°F
65°F to 77°F
65°F to 81°F
67°F to 83°F
67°F to 72°F
59°F to 79°F
61°F to 77°F
63°F to 67°F
52°F to 61°F
52°F to 63°F
56°F to 67°F
50°F to 70°F
56°F to 63°F
58°F to 72°F
63°F to 72°F
63°F to 72°F
56°F to 76°F
54°F to 76°F
58°F to 74°F
63°F to 68°F
58°F to 68°F
61°F to 68°F
68°F to 72°F
59°F to 68°F
54°F to 67°F
47°F to 65°F
Map: other cities in Slovenia in september
Cities near Portorož:
| Piran in september | good weather |
| Izola in september | good weather |
| Koper in september | good weather |
| Kostabona in september | good weather |
| Ankaran in september | good weather |
| Sežana in september | good weather |
| Stanjel in september | good weather |
| Nova Gorica in september | good weather |
| Predjama in september | good weather |
| Ilirska Bistrica in september | good weather |
| Postojna in september | good weather |
| Idrija in september | good weather |
Click over cities on the map for information about the weather in september.
Portorož
perfect weather
good
tolerable
bad
very bad
Weather data for Portorož in september:
Weather data for Portorož for september are derived from an average of the weather forecast since 2009 in Portorož. There is a margin of error and these forecasts are to be considered as general information only. The weather in Portorož can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Portorož.