September 21 is generally a great time to visit Budapest. While there is a slight chance of rain (15%), showers are usually brief. Expect comfortable 21°C weather. Expect a bustling atmosphere in Budapest right now—this is when the city truly comes alive with visitors.
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Essential Travel Info for Budapest
Currency
HUF
Ft Hungarian forint
Language
Hungarian
Driving
Right side
Connect
As of Sept 2021, Budapest has 5G from Te...
Safety
Very High Safety
GPI: 1.411
Budapest Weather Forecast for September 21
"Mild & Comfortable. Expect average highs of 20.6°C. 15% chance of rain."
What to Wear in Budapest in September
Based on historical data for September 21, Budapest typically experiences temperatures between 11.4°C and 20.6°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (15% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Budapest
Smart Suitcase
- Light Jacket
- Long Pants
Average High
20.6°C
Daytime Peak
Average Low
11.4°C
Nighttime Low
Feels Like
20.7°C
☀️ Feels accurate
Rain Chance
15%
Avg 0.9mm if it rains
Cloud Cover
53%
Overcast
Pressure
1017.6 hPa
Medium volatility
Budapest 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
🔴 31 min to burn
Type III-IV
🟡 47 min to burn
Type V-VI
🟢 78 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
14.9°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 Hungary
Flight Traffic
High
100/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~292
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Budapest
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:30
☀️ Noon
11:38
🌇 Sunset
17:46
⏱️ Daylight
12h 16m
Wind Speed
13.4 km/h
Gentle breeze
Sunshine
8.5 hrs
Direct Sun (Cloud-free)
Humidity
70%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Budapest
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Budapest
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, Budapest on September 21 averages 20.6°C with a 15% precipitation probability. Wedding/Outdoor Event Score: 100/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Budapest Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (September 21) in other destinations
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🌍 Explore the same date in different destinations around the world
📍 Is Budapest Worth Visiting on September 21?
Planning a trip to Budapest on September 21? 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 20.6°C with a 15% historical precipitation risk.
✈️ Travel Logistics: Approximately 292 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 7 vaccinations are recommended for Hungary, including COVID-19.
📊 Historical Extremes: The hottest September 21 recorded in the last 30 years saw temperatures hit 30.7°C in 2025, while the coldest dropped to 6°C in 2019.