August 21 is generally a great time to visit Copenhagen. While there is a slight chance of rain (22%), showers are usually brief. Expect comfortable 20°C weather. Copenhagen is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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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 August 21
"Mild & Comfortable. Expect average highs of 20.4°C. 22% chance of rain."
What to Wear in Copenhagen in August
Based on historical data for August 21, Copenhagen typically experiences temperatures between 14.4°C and 20.4°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (22% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Copenhagen
Smart Suitcase
- Light Jacket
- Long Pants
Average High
20.4°C
Daytime Peak
Average Low
14.4°C
Nighttime Low
Feels Like
20.5°C
☀️ Feels accurate
Rain Chance
22%
Avg 1.2mm if it rains
Cloud Cover
53%
Overcast
Pressure
1014.8 hPa
Medium volatility
Copenhagen Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 94% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
04:00 - 10:00
16:00 - 19:00
Type I-II
🔴 25 min to burn
Type III-IV
🟡 38 min to burn
Type V-VI
🟢 63 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
15.8°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
⚠️ Mixed Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Denmark
Flight Traffic
High
92/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~393
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Copenhagen
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
04:54
☀️ Noon
12:14
🌇 Sunset
19:34
⏱️ Daylight
14h 40m
Wind Speed
20.6 km/h
Moderate wind
Sunshine
10.7 hrs
Direct Sun (Cloud-free)
Humidity
75%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Copenhagen
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 Copenhagen
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🔴 Very Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
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, Copenhagen on August 21 averages 20.4°C with a 22% precipitation probability. Wedding/Outdoor Event Score: 97/100."
— 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
Compare Other Cities
Same date (August 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Copenhagen Worth Visiting on August 21?
Planning a trip to Copenhagen on August 21? 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 20.4°C with a 22% historical precipitation risk.
✈️ Travel Logistics: Approximately 393 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 18.8°C (refreshing tonic). Wave conditions are generally lake-like with heights around 0.33m.
📊 Historical Extremes: The hottest August 21 recorded in the last 30 years saw temperatures hit 22.7°C in 2020, while the coldest dropped to 12.1°C in 2021.