Český Krumlov weather in September
September in Český Krumlov: nice, a little rain, with clean air — an excellent time to visit.
#3 of 12 months in Český Krumlov · #288 of 897 destinations to visit in September · comfort 87/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Český Krumlov in September
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Český Krumlov climate normals — September
| Daytime high | 19°C / 67°F | 😎 nice |
|---|---|---|
| Nighttime low | 11°C / 52°F | |
| Rainfall | 70 mm / 2.8 in | 🌦 some rain |
| Rainy days | 11 days | |
| Humidity | 80% | 💦 very humid |
| Dew point | 12°C / 53°F | |
| Sunshine | 8.3 h/day | |
| Daylight | 12.6 h | |
| Wind | 12 km/h / 8 mph | |
| Air quality (US AQI) | 39 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Český Krumlov in September — FAQ
- Is September a good time to visit Český Krumlov?
- September in Český Krumlov: nice, a little rain, with clean air — an excellent time to visit. It ranks #3 of 12 months for Český Krumlov on SeasonMap's comfort score (87/100).
- What is the weather like in Český Krumlov in September?
- In September, Český Krumlov averages a daily high of 19.3°C and a low of 11°C, with about 70 mm of rain over roughly 11.4 rainy days.
- What is the air quality in Český Krumlov in September?
- Český Krumlov has a mean US Air Quality Index of about 39 in September.