December 21 is generally a great time to visit Bilbao. While there is a slight chance of rain (32%), showers are usually brief. Expect comfortable 14°C weather. Bilbao is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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Essential Travel Info for Bilbao
Currency
EUR
€ Euro
Language
Spanish
+3 more
Driving
Right side
Connect
As of June 2022, Bilbao has 5G from all ...
Safety
High Safety
GPI: 1.603
Bilbao Weather Forecast for December 21
"Mild & Comfortable. Expect average highs of 13.7°C. 32% chance of rain."
What to Wear in Bilbao in December
Based on historical data for December 21, Bilbao typically experiences temperatures between 8.3°C and 13.7°C. We recommend packing light jacket, long pants, umbrella to stay comfortable. With a 32% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Bilbao
Smart Suitcase
- Light Jacket
- Long Pants
- Umbrella
Average High
13.7°C
Daytime Peak
Average Low
8.3°C
Nighttime Low
Feels Like
13.2°C
🌤️ Feels accurate
Rain Chance
32%
Avg 1.8mm if it rains
Cloud Cover
71%
Overcast
Pressure
1021.6 hPa
High volatility
Bilbao Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 95% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
9.7°C
Dry air
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 Spain
Flight Traffic
High
99/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~186
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Bilbao
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
08:41
☀️ Noon
13:10
🌇 Sunset
17:40
⏱️ Daylight
8h 58m
Wind Speed
19.1 km/h
Gentle breeze
Sunshine
5.3 hrs
Direct Sun (Cloud-free)
Humidity
77%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Bilbao
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 Bilbao
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Rapid pressure changes detected. High risk for meteosensitive people.
Weather unlikely to affect joint pain.
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, Bilbao on December 21 averages 13.7°C with a 32% precipitation probability. Wedding/Outdoor Event Score: 83/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Bilbao Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
December 23
13.9°C • 28% rain
Score
86
December 24
13.8°C • 28% rain
Score
85
December 22
13.9°C • 31% rain
Score
84
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (December 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Bilbao Worth Visiting on December 21?
Planning a trip to Bilbao on December 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 13.7°C with a 32% historical precipitation risk.
✈️ Travel Logistics: Approximately 186 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 7 vaccinations are recommended for Spain, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 14.5°C (polar plunge). Wave conditions are generally surfers only with heights around 1.95m.
📊 Historical Extremes: The hottest December 21 recorded in the last 30 years saw temperatures hit 21°C in 2019, while the coldest dropped to 2.6°C in 2017.