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SloveniaThe weather in September in Idrija
It's warm in September in Idrija with an average temperature of 23°C. Temperatures this month range from a low of 18°C to a high of 26°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 Idrija. 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 Idrija, 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 30°C in 2015, Idrija reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 11°C in 2020. The extreme nighttime temperatures ranged from a lowest recorded value of 2°C to a highest value of 19°C.
Rainfall amount
In September, there is an average of 156 mm of precipitation, spread over 18 days. The wind speed is around 3 Bft, mostly coming from the Southeast.
Daily weather in September for Idrija
Click on any day in September to get detailed info about the usual weather on that day in Idrija. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Idrija | New York | |
|---|---|---|
| Average temperature | 23°C | 27°C |
| Max. temperature | 26°C | 31°C |
| Min. temperature | 9°C | -5°C |
| Total precipitation | 156 mm | 57 mm |
| Rainy days | 18 days | 9 days |
Start of September
The month of September starts in Idrija with warm temps, averaging around 25°C during the day and nights around 14°C.
Mid September
By mid-September, daytime temps drop to around 24°C, with nights around 14°C. There’s a high chance of precipitation during this time.
End of September
By the end of September, the average daytime temperature in Idrija is around 20°C, while nighttime temps are about 11°C. Expect regular precipitation, but if you’re lucky, you’ll also get some dry and sunny days.
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 Idrija for all months and discover the best travel time
Curious about the weather in other parts of Slovenia? Check out the climate and weather for spots like Ljubljana, Bled, Bohinj, or explore other destinations in Slovenia.
Temperature charts
These charts show the average temperatures in September in Idrija, Slovenia. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Idrija
Temperature in September in Idrija over the years
Precipitation charts
These charts show the average amount of precipitation in September in Idrija, 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 Idrija
Total precipitation in September in Idrija over the years
Daily UV index in September in Idrija
This chart shows the average daily UV index in September in Idrija, 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 Idrija
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Average weather in Idrija by month
Click on a month below to see detailed weather info for Idrija. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.