May 20 is generally a great time to visit Rotterdam. While there is a slight chance of rain (27%), showers are usually brief. Expect comfortable 18°C weather. It's a lively time to explore Rotterdam, with most attractions operating at full capacity.
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Essential Travel Info for Rotterdam
Currency
EUR
€ Euro
Language
Dutch
Driving
Right side
Connect
The telephone country code for the Nethe...
Safety
High Safety
GPI: 1.522
Rotterdam Weather Forecast for May 20
"Mild & Comfortable. Expect average highs of 17.6°C. 27% chance of rain."
What to Wear in Rotterdam in May
Based on historical data for May 20, Rotterdam typically experiences temperatures between 9.6°C and 17.6°C. We recommend packing light jacket, long pants to stay comfortable. With a 27% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Rotterdam
Smart Suitcase
- Light Jacket
- Long Pants
Average High
17.6°C
Daytime Peak
Average Low
9.6°C
Nighttime Low
Feels Like
17.6°C
🌤️ Feels accurate
Rain Chance
27%
Avg 1.5mm if it rains
Cloud Cover
65%
Overcast
Pressure
1015.5 hPa
Medium volatility
Rotterdam Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 94% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
04:00 - 10:00
16:00 - 20:00
Type I-II
🔴 21 min to burn
Type III-IV
🟡 32 min to burn
Type V-VI
🟢 53 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
13.1°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
❄️ Cold Water Hazard
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Netherlands
Flight Traffic
Busy
76/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~28
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Rotterdam
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
04:43
☀️ Noon
12:40
🌇 Sunset
20:36
⏱️ Daylight
15h 53m
Wind Speed
19.2 km/h
Gentle breeze
Sunshine
11.2 hrs
Direct Sun (Cloud-free)
Humidity
75%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Rotterdam
Smart Flight Estimator
Airport-to-Airport Logistics
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Add your home location in settings to see airport details.
Travel Health & Safety in Rotterdam
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
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, Rotterdam on May 20 averages 17.6°C with a 27% precipitation probability. Wedding/Outdoor Event Score: 88/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Rotterdam 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 (May 20) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Rotterdam Worth Visiting on May 20?
Planning a trip to Rotterdam on May 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 17.6°C with a 27% historical precipitation risk.
✈️ Travel Logistics: Approximately 28 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 7 vaccinations are recommended for Netherlands, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 14.5°C (polar plunge). Wave conditions are generally lake-like with heights around 0m.
📊 Historical Extremes: The hottest May 20 recorded in the last 30 years saw temperatures hit 22.6°C in 2020, while the coldest dropped to 6.3°C in 2021.