Idrija Weather in September

Idrija in September averages 21°C (70°F) during the day and 11°C (52°F) at night. September is part of the rainy season, so frequent rainfall is typical.

Rainfall in Idrija in September

Idrija is in the rainy season in September, with rain on around 13 days and an average of 185 mm (7.3 in). The rainy season here brings regular, substantial showers. It's worth being prepared for rain on most days you're out.

Temperature in Idrija in September

If you're visiting Idrija in September, expect highs of 21°C (70°F) and overnight lows around 11°C (52°F). Conditions are often most pleasant around the middle of the day. Nights cool down to 11°C (52°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Idrija in September

The area enjoys a balanced 182 hours of sunlight, ensuring it's neither too rainy nor too sunny.

For Idrija 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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• January
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• May
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• October
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For a detailed overview over the year and the best time to visit Slovenia, check out our Idrija's climate page.

Idrija Temperature in September

Min Temperature 11°C (52°F)  

Max Temperature 21°C (70°F)  

Chance of Rain 44%  

Precipitation 185 mm (7.3 in)  

Rainy days 13 days  

Humidity 72% *  

Sunshine 182 hours *  

Percentage Sunshine *  

* Data from: Ljubljana, Slovenia (37 KM, 23 Miles).

What to Wear in Idrija 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! It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in Idrija in September

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

Swimming

6/10

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 Idrija's climate page.

More climate data for Idrija

Temperature Rainfall Sunshine Humidity

See the full Idrija climate overview or explore weather in Slovenia.