Kranj Weather in September

During September, Kranj experiences pleasant daytime temperatures of 20°C (68°F) and cooler nights around 10°C (50°F). As the wettest month of the year, expect frequent rainfall.

Rainfall in Kranj in September

As the month with the most rain, you'll want to have an umbrella with you to manage the frequent showers. Looking at the last 30 years, the data shows about 13 days with rain, averaging 140 mm (5.5 in) for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in Kranj in September

If you're visiting Kranj in September, expect highs of 20°C (68°F) and overnight lows around 10°C (50°F). Conditions are often most pleasant around the middle of the day. Nights drop to around 10°C (50°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 Kranj in September

You can expect a moderate amount of sunlight, with approximately 182 hours. This means a pleasant mix of sun and overcast.

Wind Speed in Kranj in September

Wind speeds average 2 m/s (4 knots) during September. At this speed, expect light breezes that you can feel on your face and cause leaves to rustle gently. Since this is an average, some days are calmer with barely any wind while others have more noticeable gentle breezes.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, June, July, August and September typically offer the best weather for Kranj.

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

Kranj Temperature in September

Min Temperature 10°C (50°F)  

Max Temperature 20°C (68°F)  

Chance of Rain 42%  

Precipitation 140 mm (5.5 in)  

Rainy days 13 days  

Humidity 72% *  

Windspeed 2 m/s (4 knots) *  

Sunshine 182 hours *  

Percentage Sunshine *  

* Data from: Ljubljana, Slovenia (23 KM, 14 Miles).

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Kranj typically drop from around 22°C (72°F) at the start of September to approximately 18°C (64°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

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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

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Historical weather for Kranj in September

Browse day-by-day weather records for Kranj spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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‹ January February March April May June July August September October November December ›

Kranj historical weather extremes in September

According to our 49 years of weather records for Kranj, the following extremes were recorded between 1976 and 2025.

• Kranj recorded its highest September temperature of 31°C (88°F) on September 1, 2015.
• Kranj experienced its chilliest September day on September 18, 1977, reaching only 6°C (43°F).
• Kranj registered its coldest September night on September 29, 2008, with temperatures dropping to -1°C (30°F).

What to Wear in Kranj 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. Prepare for significant rainfall with proper waterproof clothing and shoes. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in Kranj in September

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

Swimming

6/10

Cycling

9/10

Walking

9/10

Camping

6/10

Outdoor sports

9/10

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 Kranj's climate page.

More climate data for Kranj

Temperature Rainfall Sunshine Humidity Wind Speed

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