Temperatures in September
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.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Slovenia in September. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of September
The month of September starts in Slovenia with warm temperatures, averaging around 24°C during the day and nights close to 14°C. A few showers might pop up in the first days of the month, but the weather remains mostly sunny and dry.
Mid-September
By mid-September, the average daytime temperature stays the same at 24°C, with nights close to 13°C. The chance of precipitation is high during this period.
End of September
By the end of September, the average daytime temperature in Slovenia will be around 20°C, with nights close to 10°C. There’s regular precipitation, but with a bit of luck, you’ll also get some dry and sunny days.
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Precipitation in September
In September, there is an average of 156 mm of precipitation, spread over 10 days. The wind speed is around 3 Bft, mostly coming from the Southeast.
The average precipitation chance is 32% per day this month. Though it seems pretty low, the weather’s variable. Some days have higher and others lower precipitation chances, which lowers the average.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in September for Slovenia. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Slovenia in September |
UK | ||
|---|---|---|---|
 Average Temperature |
22°C | 20°C | |
 High Temp |
25°C | 22°C | |
| Low Temp |
17°C | 17°C | |
 Total Precipitation |
156 mm | 44 mm | |
| Rainy Days |
10 days | 8 days | |
August
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.
Is September a good time to visit Slovenia?
After some sun? Then September isn’t the best time to be in Slovenia. The temperature is pleasant, but there’s too much chance of rain this month.
Temperature records for Slovenia in September
With 32°C, Slovenia hit the highest temperature in the last 10 years in September 2015. The lowest daytime temperature in this month was 11°C in 2017. The extreme night temperatures ranged from a low of 0°C to a high of 19°C.
Check out the climate of Slovenia for all months and discover the best travel time
The climate of Slovenia is based on weather data from Ljubljana. Other spots, like Bled, Bohinj or Piran, might have different weather. You can check out all destinations in Slovenia for a full picture of the climate.
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Daily Temperature in September in Slovenia
This chart shows the average daily temperatures, both day and night, for each day in September in Slovenia, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in September in Slovenia
The chart below shows the average daily precipitation in September for Slovenia, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 10 days of rain in Slovenia.
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.
Temperature in September in Slovenia Over the Years
This chart shows the average temperature in September in Slovenia, measured in degrees Celsius, over the past years.
Total Precipitation in September in Slovenia Over the Years
This chart shows the average precipitation in September in Slovenia, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for Slovenia
Click on a specific day in September for detailed info on the typical weather on that day in Slovenia. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Slovenia
Have you been to Slovenia in September?
Share your weather experience in September in Slovenia.
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.
