Prague weather in September
September in Prague: nice, a little rain, with clean air — one of the best months to visit.
#1 of 12 months in Prague · #74 of 604 destinations to visit in September · comfort 90/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Prague climate normals — September
| Daytime high | 21°C / 70°F | 😎 nice |
|---|---|---|
| Nighttime low | 12°C / 53°F | |
| Feels like (high) | 20°C / 68°F | |
| Rainfall | 54 mm / 2.1 in | 🌦 some rain |
| Rainy days | 8 days | |
| Humidity | 75% | 💧 humid |
| Dew point | 12°C / 53°F | |
| Sunshine | 8.9 h/day | |
| Daylight | 12.6 h | |
| Wind | 13 km/h / 8 mph | |
| Air quality (US AQI) | 46 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Prague in September — FAQ
- Is September a good time to visit Prague?
- September in Prague: nice, a little rain, with clean air — one of the best months to visit. It ranks #1 of 12 months for Prague on SeasonMap's comfort score (90/100).
- What is the weather like in Prague in September?
- In September, Prague averages a daily high of 20.9°C and a low of 11.7°C, with about 54.3 mm of rain over roughly 8.4 rainy days.
- What is the air quality in Prague in September?
- Prague has a mean US Air Quality Index of about 46 in September.