Český Krumlov Weather in September
September in Český Krumlov averages 18°C (64°F) during the day and 9°C (48°F) at night. Quite a bit of rainfall is typical this month, with around 78 mm (3.1 in) on average. An umbrella is a good idea.
Rainfall in Český Krumlov in September
You can expect rain on around 12 days based on historical patterns, with 78 mm (3.1 in) average for the month. Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.
Temperature in Český Krumlov in September
Temperatures in Český Krumlov in September top out at 18°C (64°F) and drop to 9°C (48°F) overnight. This creates a mild day-to-night pattern that is generally easy to manage with the right clothing. Nights fall to 9°C (48°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.
Sunshine in Český Krumlov in September
The month experiences a moderate amount of sunlight, with 156 hours of sunshine. This provides a nice balance between sunshine and clouds.Our weather planner can help you find worldwide destinations with pleasant weather during this period. June, July, August and September typically offer the best weather for Český Krumlov.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Czech Republic, check out our Český Krumlov's climate page.
Český Krumlov Temperature in September
Min Temperature
9°C (48°F)
Max Temperature
18°C (64°F)
Chance of Rain
41%
Precipitation
78 mm (3.1 in)
Rainy days
12 days
Sunshine
156 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Český Krumlov typically drop from around 20°C (68°F) at the start of September to approximately 17°C (63°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 Český Krumlov in September
Browse day-by-day weather records for Český Krumlov spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Český Krumlov historical weather extremes in September
Based on weather observations in Český Krumlov between 1976 and 2025, these are the recorded extremes during September.
- On September 4, 2024, temperatures climbed to 31°C (88°F), marking the warmest September day on record.
- On September 25, 2002, Český Krumlov saw its coldest September day with temperatures maxing out at 6°C (43°F).
- The coldest night in September in Český Krumlov was on September 26, 2018, with a minimum of 0°C (32°F).
Best Places in Czech Republic in September
Find out more about the weather in Czech Republic and which places have the best travel conditions in this month. See all of Czech Republic in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Český Krumlov in September
For Český Krumlov in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Český Krumlov 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 Czech Republic, check out our Český Krumlov's climate page.
See the full Český Krumlov climate overview or explore weather in Czech Republic.
