The weather in September in Slovenia
It's pleasantly warm in September in Slovenia with an average temperature of 22°C. Temperatures this month range from a low of 17°C to a high of 25°C. At night, you can expect temperatures between 9°C and 15°C.
Looking for sun? September isn’t a good month to be in Slovenia. The temperature is nice, but there’s too much chance of rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Slovenia. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 32°C in 2015, Slovenia reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 11°C in 2017. The extreme nighttime temperatures ranged from a lowest recorded value of 0°C to a highest value of 19°C.
Rainfall amount
In September, there is an average of 156 mm of precipitation, spread over 16 days. The wind speed is around 3 Bft, mostly coming from the Southeast.
Daily weather in September for Slovenia
Click on any day in September to get detailed info about the usual weather on that day in Slovenia. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Slovenia | New York | |
|---|---|---|
| Average temperature | 22°C | 27°C |
| Max. temperature | 25°C | 31°C |
| Min. temperature | 9°C | -5°C |
| Total precipitation | 156 mm | 57 mm |
| Rainy days | 16 days | 9 days |
Start of September
The month of September starts in Slovenia with warm temps, averaging around 24°C during the day and nights around 14°C.
Mid September
By mid-September, daytime temps stay steady at around 24°C, with nights around 13°C. There’s a high chance of precipitation during this time.
End of September
By the end of September, the average daytime temperature in Slovenia is around 20°C, while nighttime temps are about 10°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
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UV index
The UV index is a maximum of 7 this month. That's a moderate to high value on the intensity scale of 1 to 11. Unprotected skin can burn within 15-25 minutes.
Check out the climate of Slovenia for all months and discover the best travel time
The climate in Slovenia is based on weather data from Ljubljana. Other places, like Bled, Bohinj or Piran, might have different weather. You can check out all destinations in Slovenia to get the full picture of the climate.
Temperature charts
These charts show the average temperatures in September in Slovenia. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Slovenia
Temperature in September in Slovenia over the years
Precipitation charts
These charts show the average amount of precipitation in September in Slovenia. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in Slovenia
Total precipitation in September in Slovenia over the years
Daily UV index in September in Slovenia
This chart shows the average daily UV index in September in Slovenia, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in September in Slovenia
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Average weather in Slovenia by month
Click on a month below to see detailed weather info for Slovenia. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.