Cerkno Weather in September
September in Cerkno brings pleasant temperatures, with daytime highs of 20°C (68°F) and nights around 10°C (50°F). It's part of the rainy season, with 182 mm (7.2 in) of rainfall on average, so an umbrella or poncho is a good idea.
Rainfall in Cerkno in September
As part of the rainy season, Cerkno sees around 13 days of rain in September, with an average of 182 mm (7.2 in). Rainy season showers tend to be fairly substantial. A good rain jacket or umbrella is worth having with you most days.
Temperature in Cerkno in September
In September, expect pleasant temperatures in Cerkno, with highs of 20°C (68°F) and lows of 10°C (50°F) at night. Conditions are often most pleasant around the middle of the day. With overnight lows of 10°C (50°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.
Sunshine in Cerkno in September
You can expect a moderate amount of sunlight, with approximately 182 hours. Even though this month is part of the wet season, you can still see the sun occasionally.Should you favor a climate that's both dry and comfortably warm, June, July and August typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Slovenia, check out our Cerkno's climate page.
Cerkno Temperature in September
Min Temperature
10°C (50°F)
Max Temperature
20°C (68°F)
Chance of Rain
44%
Precipitation
182 mm (7.2 in)
Rainy days
13 days
Humidity
72% *
Sunshine
182 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Cerkno typically drop from around 23°C (73°F) at the start of September to approximately 19°C (66°F) by the end. Nights are cool, with lows typically ranging from 7°C (45°F) to 11°C (52°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Cerkno in September
Browse day-by-day weather records for Cerkno spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Cerkno historical weather extremes in September
According to our 49 years of weather records for Cerkno, the following extremes were recorded between 1976 and 2025.
- The warmest day in September was on September 21, 1985, with a maximum of 32°C (90°F).
- Cerkno experienced its chilliest September day on September 28, 2020, reaching only 7°C (45°F).
- Cerkno registered its coldest September night on September 30, 2010, with temperatures dropping to -1°C (30°F).
Best Places in Slovenia in September
Find out more about the weather in Slovenia and which places have the best travel conditions in this month. See all of Slovenia in September →
perfect weather
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tolerable
unpleasant
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What to Wear in Cerkno 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! Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Cerkno in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Slovenia, check out our Cerkno's climate page.
Temperature Rainfall Sunshine Humidity
See the full Cerkno climate overview or explore weather in Slovenia.
