May 31 is statistically one of the best days of the year in Barcelona. With minimal rain risk (14%) and pleasant highs of 23°C, it's ideal for outdoor adventures. You'll enjoy Barcelona with reasonable crowd levels and competitive accommodation options. Note: May 31 is Day of Castilla-La Mancha in Barcelona, so expect special events, closures, and festive atmosphere.
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Essential Travel Info for Barcelona
Currency
EUR
€ Euro
Language
Spanish
+3 more
Driving
Right side
Connect
Barcelona has 5G from all Spanish carrie...
Safety
High Safety
GPI: 1.603
Barcelona Weather Forecast for May 31
"Mild & Comfortable. Expect average highs of 23°C. 14% chance of rain."
What to Wear in Barcelona in May
Based on historical data for May 31, Barcelona typically experiences temperatures between 16°C and 23°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (14% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Barcelona
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
23°C
Daytime Peak
Average Low
16°C
Nighttime Low
Feels Like
23.5°C
☀️ Feels accurate
Rain Chance
14%
Avg 0.5mm if it rains
Cloud Cover
47%
Overcast
Pressure
1016.4 hPa
Low volatility
Barcelona Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 100% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
05:00 - 10:00
16:00 - 20:00
Type I-II
🔴 14 min to burn
Type III-IV
🟡 21 min to burn
Type V-VI
🟢 35 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
18.3°C
Noticeable
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
Holiday
Day of Castilla-La Mancha
Flight Traffic
Moderate
45/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~585
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Barcelona
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:22
☀️ Noon
12:50
🌇 Sunset
20:18
⏱️ Daylight
14h 56m
Wind Speed
14.8 km/h
Gentle breeze
Sunshine
12.5 hrs
Direct Sun (Cloud-free)
Humidity
75%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Barcelona
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 Barcelona
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
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, Barcelona on May 31 averages 23°C with a 14% precipitation probability. Wedding/Outdoor Event Score: 100/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Barcelona Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (May 31) in other destinations
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📍 Is Barcelona Worth Visiting on May 31?
Planning a trip to Barcelona on May 31? 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 23°C with a 14% historical precipitation risk.
🎉 Local Event: The date coincides with Day of Castilla-La Mancha, which may influence local business hours and event availability.
✈️ Travel Logistics: Approximately 585 landing slots available daily during this period, indicating peak tourist activity.
💉 Health Advisory: 7 vaccinations are recommended for Spain, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 20.4°C (refreshing tonic). Wave conditions are generally lake-like with heights around 0.49m.
📊 Historical Extremes: The hottest May 31 recorded in the last 30 years saw temperatures hit 28.3°C in 2025, while the coldest dropped to 13.4°C in 2019.