Normal weather for Slovenia 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.
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.
Slovenia in September |
New York | ||
|---|---|---|---|
 Average Temperature |
22°C | 27°C | |
 High Temp |
25°C | 31°C | |
| Low Temp |
17°C | 21°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. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.
With the temperature difference between day and night, it’s smart to wear layers. A T-shirt, light pants or skirt, and a light jacket are great for the day. In the evening and morning, choose a light jacket, sweater or hoodie, and long pants.
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.
Since it cools down at night, it’s a good idea to wear layers. A T-shirt, light pants or skirt, and a light jacket are great for the day. In the evening and morning, choose a light jacket, sweater or hoodie, and long pants.
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.
Because temperatures drop in the evening, wearing layers is recommended. During the day, a shirt, maybe a light sweater, and thin pants will do. In the evening and morning, go for a warm jacket, sweater or hoodie, and long pants.
Find affordable vacations to Slovenia 
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?
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.
Temperature records for Slovenia in September
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.
August
Plan your next vacation
Don’t miss the best vacation deals for Slovenia and see what our partners have for you.
Daily Temperature in September in Slovenia
This chart shows the average daily high and low temperatures in September for Slovenia, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in Slovenia
The chart below shows the average daily precipitation in September for Slovenia, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed 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 it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 16 days of precipitation 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 few years.
Total Precipitation in September in Slovenia Over the Years
This chart shows the average precipitation in September in Slovenia, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily Climate 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.
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.
