December 15 is generally a great time to visit Brussels. While there is a slight chance of rain (20%), showers are usually brief. Expect comfortable 7°C weather. As it's peak season for Brussels, we recommend booking your stay well in advance to secure the best rates.
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Essential Travel Info for Brussels
Currency
EUR
€ Euro
Language
German
+2 more
Driving
Right side
Safety
High Safety
GPI: 1.526
Brussels Weather Forecast for December 15
"Mild & Comfortable. Expect average highs of 6.6°C. 20% chance of snow."
What to Wear in Brussels in December
Based on historical data for December 15, Brussels typically experiences temperatures between 2.2°C and 6.6°C. We recommend packing heavy coat, scarf, gloves to stay comfortable. Trends suggest it will stay mostly dry (20% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Brussels
Smart Suitcase
- Heavy Coat
- Scarf
- Gloves
Average High
6.6°C
Daytime Peak
Average Low
2.2°C
Nighttime Low
Feels Like
3.1°C
❄️ Slightly colder
Snow Chance
20%
Avg 1mm if it snows
Snowfall
0.1 cm
~20% chance
Pressure
1019 hPa
High volatility
Brussels Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 91% 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
4.6°C
Dry air
Heat Stress
Low
No heat warning
😕 Best outdoor time:
Midday (11 AM - 3 PM) when warmest
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Belgium
Flight Traffic
High
89/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~543
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Brussels
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
08:39
☀️ Noon
12:38
🌇 Sunset
16:38
⏱️ Daylight
7h 58m
Wind Speed
19.5 km/h
Gentle breeze
Sunshine
3.4 hrs
Direct Sun (Cloud-free)
Humidity
87%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Brussels
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
Add your home location in settings to see airport details.
Travel Health & Safety in Brussels
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
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 acceptable. Sensitive individuals should limit prolonged outdoor exertion.
Regional Safety Profile
Seismic Activity
Rare minor tremors. Buildings are earthquake-resistant.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Brussels on December 15 averages 6.6°C with a 20% precipitation probability. Wedding/Outdoor Event Score: 49/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Brussels Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
December 17
7°C • 24% rain
Score
50
December 18
7.2°C • 26% rain
Score
50
December 19
7.3°C • 29% rain
Score
50
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (December 15) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Brussels Worth Visiting on December 15?
Planning a trip to Brussels on December 15? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year offers a bracing seasonal atmosphere averaging 6.6°C with a 20% historical precipitation risk.
✈️ Travel Logistics: Approximately 543 landing slots available daily during this period, indicating peak tourist activity.
💉 Health Advisory: 7 vaccinations are recommended for Belgium, including COVID-19.
📊 Historical Extremes: The hottest December 15 recorded in the last 30 years saw temperatures hit 10.8°C in 2025, while the coldest dropped to -6.7°C in 2022.