Cerkno
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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.

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
*
* Data from: Ljubljana, Slovenia (41 KM, 25 Miles).

Cerkno Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Cerkno - and find the best time to visit.

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 records 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 50 years of weather records for Cerkno, the following extremes were recorded between 1976 and 2026.

  • 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
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

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.

  • Swimming
    6/10
  • Camping
    6/10

Cerkno 3-Day Forecast

More climate data for Cerkno

Popular in September

Where to go in September - average daytime high across popular destinations.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.