October 21 is generally a great time to visit Rotterdam. While there is a slight chance of rain (38%), showers are usually brief. Expect comfortable 15°C weather. It's a great middle-ground for visiting Rotterdam—enough activity to feel the pulse, but no overwhelming lines.
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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 October 21
"Mild & Comfortable. Expect average highs of 14.7°C. 38% chance of rain."
What to Wear in Rotterdam in October
Based on historical data for October 21, Rotterdam typically experiences temperatures between 9.1°C and 14.7°C. We recommend packing light jacket, long pants, umbrella to stay comfortable. With a 38% 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
- Umbrella
Average High
14.7°C
Daytime Peak
Average Low
9.1°C
Nighttime Low
Feels Like
14.6°C
🌤️ Feels accurate
Rain Chance
38%
Avg 2mm if it rains
Cloud Cover
72%
Overcast
Pressure
1011.3 hPa
High volatility
Rotterdam Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
✓ This date historically delivers consistent weather 78% 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
🔴 89 min to burn
Type III-IV
🟡 134 min to burn
Type V-VI
🟢 223 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
12°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
Moderate
51/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~19
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Rotterdam
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
07:17
☀️ Noon
12:27
🌇 Sunset
17:38
⏱️ Daylight
10h 20m
Wind Speed
22.3 km/h
Moderate wind
Sunshine
5.8 hrs
Direct Sun (Cloud-free)
Humidity
84%
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
💰💰 Moderate
Health & Wellbeing
Meteo-Health Forecast
Rapid pressure changes detected. High risk for meteosensitive people.
Mild discomfort possible for arthritic conditions.
Fish are active due to pressure changes.
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 October 21 averages 14.7°C with a 38% precipitation probability. Wedding/Outdoor Event Score: 84/100."
— 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
October 16
14.8°C • 22% rain
Score
92
October 18
14.8°C • 26% rain
Score
92
October 17
14.8°C • 24% rain
Score
91
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (October 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Rotterdam Worth Visiting on October 21?
Planning a trip to Rotterdam on October 21? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year offers a bracing seasonal atmosphere averaging 14.7°C with a 38% historical precipitation risk.
✈️ Travel Logistics: Approximately 19 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 14.9°C (polar plunge). Wave conditions are generally lake-like with heights around 0m.
📊 Historical Extremes: The hottest October 21 recorded in the last 30 years saw temperatures hit 20°C in 2020, while the coldest dropped to 4.5°C in 2016.