September 20 is generally a great time to visit Vienna. While there is a slight chance of rain (18%), showers are usually brief. Expect comfortable 20°C weather. Expect a bustling atmosphere in Vienna right now—this is when the city truly comes alive with visitors.
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Essential Travel Info for Vienna
Currency
EUR
€ Euro
Language
German
Driving
Right side
Connect
As of Sep 2025, the entire city and its ...
Safety
Very High Safety
GPI: 1.3
Vienna Weather Forecast for September 20
"Mild & Comfortable. Expect average highs of 19.9°C. 18% chance of rain."
What to Wear in Vienna in September
Based on historical data for September 20, Vienna typically experiences temperatures between 11.3°C and 19.9°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (18% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Vienna
Smart Suitcase
- Light Jacket
- Long Pants
Average High
19.9°C
Daytime Peak
Average Low
11.3°C
Nighttime Low
Feels Like
19.9°C
🌤️ Feels accurate
Rain Chance
18%
Avg 0.9mm if it rains
Cloud Cover
54%
Overcast
Pressure
1018.3 hPa
Medium volatility
Vienna Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
✓ Weather is generally predictable, but pack for minor variations. A light backup layer is recommended.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 32 min to burn
Type III-IV
🟡 48 min to burn
Type V-VI
🟢 80 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
14.7°C
Pleasant
Heat Stress
Low
No heat warning
😊 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Austria
Flight Traffic
High
95/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~746
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Vienna
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:39
☀️ Noon
11:49
🌇 Sunset
17:59
⏱️ Daylight
12h 20m
Wind Speed
17 km/h
Gentle breeze
Sunshine
8.5 hrs
Direct Sun (Cloud-free)
Humidity
72%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Vienna
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Vienna
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is acceptable. Sensitive individuals should limit prolonged outdoor exertion.
Regional Safety Profile
Seismic Activity
Rare minor tremors. Buildings are earthquake-resistant.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Vienna on September 20 averages 19.9°C with a 18% precipitation probability. Wedding/Outdoor Event Score: 98/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Vienna Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (September 20) in other destinations
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Rome
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London
United Kingdom
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Netherlands
🌍 Explore the same date in different destinations around the world
📍 Is Vienna Worth Visiting on September 20?
Planning a trip to Vienna on September 20? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year is characterized by pleasant mild weather averaging 19.9°C with a 18% historical precipitation risk.
✈️ Travel Logistics: Approximately 746 landing slots available daily during this period, indicating peak tourist activity.
💉 Health Advisory: 6 vaccinations are recommended for Austria, including COVID-19.
📊 Historical Extremes: The hottest September 20 recorded in the last 30 years saw temperatures hit 28.1°C in 2025, while the coldest dropped to 7.4°C in 2019.