September 20 is generally a great time to visit Amsterdam. While there is a slight chance of rain (18%), showers are usually brief. Expect comfortable 18°C weather. Expect a bustling atmosphere in Amsterdam right now—this is when the city truly comes alive with visitors.
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Essential Travel Info for Amsterdam
Currency
EUR
€ Euro
Language
Dutch
Driving
Right side
Connect
The first Internet cafes in the country ...
Safety
High Safety
GPI: 1.522
Amsterdam Weather Forecast for September 20
"Mild & Comfortable. Expect average highs of 18.3°C. 18% chance of rain."
What to Wear in Amsterdam in September
Based on historical data for September 20, Amsterdam typically experiences temperatures between 11.6°C and 18.3°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 Amsterdam
Smart Suitcase
- Light Jacket
- Long Pants
Average High
18.3°C
Daytime Peak
Average Low
11.6°C
Nighttime Low
Feels Like
18.3°C
🌤️ Feels accurate
Rain Chance
18%
Avg 0.8mm if it rains
Cloud Cover
60%
Overcast
Pressure
1017.2 hPa
Medium volatility
Amsterdam Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 98% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 38 min to burn
Type III-IV
🟡 57 min to burn
Type V-VI
🟢 95 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
14.6°C
Pleasant
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Any time during daylight hours
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
⚠️ Mixed Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Netherlands
Flight Traffic
High
98/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~2,440
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Amsterdam
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:23
☀️ Noon
12:35
🌇 Sunset
18:46
⏱️ Daylight
12h 22m
Wind Speed
17.8 km/h
Gentle breeze
Sunshine
8.6 hrs
Direct Sun (Cloud-free)
Humidity
79%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Amsterdam
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
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Travel Health & Safety in Amsterdam
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 excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Rare minor tremors. Buildings are earthquake-resistant.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Amsterdam on September 20 averages 18.3°C with a 18% precipitation probability. Wedding/Outdoor Event Score: 94/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Amsterdam Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (September 20) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Amsterdam Worth Visiting on September 20?
Planning a trip to Amsterdam 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 18.3°C with a 18% historical precipitation risk.
✈️ Travel Logistics: Approximately 2,440 landing slots available daily during this period, indicating peak tourist activity.
💉 Health Advisory: 7 vaccinations are recommended for Netherlands, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 18.3°C (refreshing tonic). Wave conditions are generally surfers only with heights around 1.41m.
📊 Historical Extremes: The hottest September 20 recorded in the last 30 years saw temperatures hit 22.1°C in 2025, while the coldest dropped to 6.6°C in 2019.