December 21 is generally a great time to visit Copenhagen. While there is a slight chance of rain (25%), showers are usually brief. Expect comfortable 4°C weather. Expect a bustling atmosphere in Copenhagen right now—this is when the city truly comes alive with visitors.
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Essential Travel Info for Copenhagen
Currency
DKK
kr Danish krone
Language
Danish
Driving
Right side
Connect
Libraries offer free internet access for...
Safety
Very High Safety
GPI: 1.296
Copenhagen Weather Forecast for December 21
"Cold & Crisp. Expect average highs of 4.4°C. 25% chance of snow."
What to Wear in Copenhagen in December
Based on historical data for December 21, Copenhagen typically experiences temperatures between 1.1°C and 4.4°C. We recommend packing heavy coat, scarf, gloves to stay comfortable. Trends suggest it will stay mostly dry (25% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Copenhagen
Smart Suitcase
- Heavy Coat
- Scarf
- Gloves
Average High
4.4°C
Daytime Peak
Average Low
1.1°C
Nighttime Low
Feels Like
-0.1°C
🥶 Slightly colder
Snow Chance
25%
Avg 1.2mm if it snows
Snowfall
0.3 cm
~25% chance
Pressure
1010.9 hPa
High volatility
Copenhagen Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 87% 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
2.6°C
Dry air
Heat Stress
Low
No heat warning
😣 Best outdoor time:
Midday (11 AM - 3 PM) when warmest
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 Denmark
Flight Traffic
High
83/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~356
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Copenhagen
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
08:38
☀️ Noon
12:08
🌇 Sunset
15:39
⏱️ Daylight
7h 1m
Wind Speed
23.2 km/h
Moderate wind
Sunshine
2.1 hrs
Direct Sun (Cloud-free)
Humidity
88%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Copenhagen
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 Copenhagen
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.
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, Copenhagen on December 21 averages 4.4°C with a 25% precipitation probability. Wedding/Outdoor Event Score: 36/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Copenhagen Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
December 18
4.7°C • 21% rain
Score
39
December 19
4.7°C • 21% rain
Score
39
December 17
4.8°C • 21% rain
Score
37
💡 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 Copenhagen Worth Visiting on December 21?
Planning a trip to Copenhagen 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 4.4°C with a 25% historical precipitation risk.
✈️ Travel Logistics: Approximately 356 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 7 vaccinations are recommended for Denmark, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 5.1°C (polar plunge). Wave conditions are generally fun waves with heights around 0.66m.
📊 Historical Extremes: The hottest December 21 recorded in the last 30 years saw temperatures hit 10.2°C in 2015, while the coldest dropped to -2.2°C in 2021.