Ilirska Bistrica Weather in September

In Ilirska Bistrica, September brings pleasant daytime temperatures around 21°C (70°F), with nights cooling to 12°C (54°F). This month falls within the rainy season, so expect frequent rainfall.

Rainfall in Ilirska Bistrica in September

Ilirska Bistrica is in the rainy season in September, with rain on around 13 days and an average of 200 mm (7.9 in). The rain this month falls heavily when it arrives, so waterproofs are worth keeping handy.

Temperature in Ilirska Bistrica in September

Ilirska Bistrica in September gets highs of 21°C (70°F) during the day and drops to 12°C (54°F) at night. Conditions are often most pleasant around the middle of the day. Nights drop to around 12°C (54°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in Ilirska Bistrica in September

Enjoy a sunny month with about 202 hours of sunshine, even though this month falls in the wet season. There is still enough sun to enjoy the outdoors.

For Ilirska Bistrica itself, May, June, July and August generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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For a detailed overview over the year and the best time to visit Slovenia, check out our Ilirska Bistrica's climate page.

Ilirska Bistrica Temperature in September

Min Temperature 12°C (54°F)  

Max Temperature 21°C (70°F)  

Chance of Rain 43%  

Precipitation 200 mm (7.9 in)  

Rainy days 13 days  

Humidity 64% *  

Sunshine 202 hours *  

Percentage Sunshine 57% *  

* Data from: Rijeka, Croatia (28 KM, 17 Miles).

What to Wear in Ilirska Bistrica in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Ilirska Bistrica in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

7/10

Camping

6/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Slovenia, check out our Ilirska Bistrica's climate page.

More climate data for Ilirska Bistrica

Temperature Rainfall Sunshine Humidity

See the full Ilirska Bistrica climate overview or explore weather in Slovenia.