Vienna weather in September
September in Vienna: nice, a little rain, with clean air — one of the best months to visit.
#1 of 12 months in Vienna · #54 of 604 destinations to visit in September · comfort 91/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Vienna climate normals — September
| Daytime high | 22°C / 72°F | 😎 nice |
|---|---|---|
| Nighttime low | 13°C / 55°F | |
| Feels like (high) | 21°C / 70°F | |
| Rainfall | 59 mm / 2.3 in | 🌦 some rain |
| Rainy days | 10 days | |
| Humidity | 71% | 💧 humid |
| Dew point | 12°C / 53°F | |
| Sunshine | 9.1 h/day | |
| Daylight | 12.6 h | |
| Wind | 16 km/h / 10 mph | |
| Air quality (US AQI) | 42 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Vienna in September — FAQ
- Is September a good time to visit Vienna?
- September in Vienna: nice, a little rain, with clean air — one of the best months to visit. It ranks #1 of 12 months for Vienna on SeasonMap's comfort score (91/100).
- What is the weather like in Vienna in September?
- In September, Vienna averages a daily high of 22°C and a low of 12.8°C, with about 59 mm of rain over roughly 9.6 rainy days.
- What is the air quality in Vienna in September?
- Vienna has a mean US Air Quality Index of about 42 in September.