Vienna weather in September
In September, Vienna has an average high of 22 °C71 °F and an average low of 11 °C52 °F, with about 79 mm3.1 in of precipitation. It is the 4th warmest month of the year and ranks 5th for precipitation.
How September compares with other months
Compared with August, September is 5.4 °C9.6 °F cooler on average and drier by 7 mm0.3 in. Compared with October, September is 5.4 °C9.8 °F warmer on average and wetter by 25 mm1.0 in. Daylight lasts about 12.5 hours around the middle of the month. Average relative humidity is 71% and the average cloud amount 60%.
Is September a good time to visit Vienna?
Yes — September is one of the most comfortable months to visit Vienna by our comfort score, which favours average highs of 21–28 °C, lows above 5 °C, little rain and moderate humidity.
What to wear in September
For Vienna in September, pack light layers — T-shirts plus a light sweater or jacket and an extra layer for the cooler mornings and evenings.
September in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Vienna | 2271 | 1152 | 793.1 |
| Bratislava | 2272 | 1152 | 692.7 |
| Győr | 2373 | 1152 | 612.4 |
| Brno | 2170 | 1050 | 612.4 |
| Graz | 2170 | 1051 | 963.8 |
| Linz | 2068 | 1050 | 803.1 |
| Székesfehérvár | 2373 | 1253 | 622.4 |
| Žilina | 2068 | 949 | 752.9 |
| Budapest | 2374 | 1153 | 572.2 |
Nearby places that are more than 1 °C1.8 °F cooler: Linz and Žilina.
Other months in Vienna
- January3 °C37 °F / −4 °C26 °F
- February5 °C41 °F / −3 °C27 °F
- March10 °C51 °F / 1 °C33 °F
- April17 °C62 °F / 5 °C42 °F
- May21 °C70 °F / 10 °C51 °F
- June26 °C78 °F / 15 °C58 °F
- July28 °C82 °F / 17 °C62 °F
- August27 °C81 °F / 16 °C61 °F
- September22 °C71 °F / 11 °C52 °F
- October16 °C60 °F / 6 °C43 °F
- November9 °C49 °F / 2 °C36 °F
- December4 °C39 °F / −2 °C28 °F
Frequently asked questions
How warm is Vienna in September?
In September the average high in Vienna is 22 °C (71 °F) and the average low is 11 °C (52 °F).
Does it rain a lot in Vienna in September?
On average about 79 mm (3.1 in) of precipitation falls in September; it ranks 5th of the 12 months.
Is September the warmest month in Vienna?
No. The warmest month in Vienna is July, with an average high of 28 °C (82 °F). The coldest month is January, with an average low of -4 °C (26 °F).
How long is the day in Vienna in September?
In the middle of September the day in Vienna lasts about 12.5 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Vienna in September?
The average relative humidity in September is about 71%. This is a long-term average for the whole day.
How cloudy is Vienna in September?
On average about 60% of the sky is covered by cloud in September. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 373 m, while Vienna lies at about 171 m. Temperatures on this page were therefore adjusted by +1.3 °C2.4 °F using the standard lapse rate of 6.5 °C per 1,000 m.