Vienna Weather in September
In September, Vienna averages a high of 21°C (70°F) and a low of 12°C (54°F), from 56 years of daily records (1971–2026).
21°C
Average high
70°F
12°C
Average low
54°F
34°C
Record high
92°F · September 17, 2015
3°C
Record low
38°F · September 28, 1977
What September Is Like in Vienna
- September in Vienna has become 1.5°C (2.8°F) warmer on average: the 2012–2026 average against 1970–1989.
- The coldest September reading, 3°C (38°F) on September 28, 1977, has not been matched in 49 years.
- The warmest September in the record was 2023; the coldest was 1996.
At least 1 mm of rain falls on 24% of September days, and the month averages 57 mm in total.
Warmest: 2023 (26.4°C)Latest: 2026 (23.3°C)10-year averageLong-run average (20.9°C)
Look Up a Day in September
See the weather in Vienna on any September date, year by year.
Source: NOAA GHCN-Daily, Wien (1971–2026). Averages cover 1971–2026. How we compute this