August 21 is generally a great time to visit Stockholm. While there is a slight chance of rain (25%), showers are usually brief. Expect comfortable 20°C weather. As it's peak season for Stockholm, we recommend booking your stay well in advance to secure the best rates.
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Essential Travel Info for Stockholm
Currency
SEK
kr Swedish krona
Language
Swedish
Driving
Right side
Connect
As of Sept 2021, central Stockholm has 5...
Safety
High Safety
GPI: 1.564
Stockholm Weather Forecast for August 21
"Mild & Comfortable. Expect average highs of 19.9°C. 25% chance of rain."
What to Wear in Stockholm in August
Based on historical data for August 21, Stockholm typically experiences temperatures between 13.4°C and 19.9°C. We recommend packing light jacket, long pants 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 Stockholm
Smart Suitcase
- Light Jacket
- Long Pants
Average High
19.9°C
Daytime Peak
Average Low
13.4°C
Nighttime Low
Feels Like
19.9°C
🌤️ Feels accurate
Rain Chance
25%
Avg 1.2mm if it rains
Cloud Cover
59%
Overcast
Pressure
1012.9 hPa
Medium volatility
Stockholm 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 15 for extended outdoor time
Type I-II
🔴 30 min to burn
Type III-IV
🟡 45 min to burn
Type V-VI
🟢 75 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
15.7°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
✅ Excellent Swimming Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Sweden
Flight Traffic
High
91/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~301
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Stockholm
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
04:19
☀️ Noon
11:52
🌇 Sunset
19:25
⏱️ Daylight
15h 5m
Wind Speed
16.1 km/h
Gentle breeze
Sunshine
10.9 hrs
Direct Sun (Cloud-free)
Humidity
77%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Stockholm
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Stockholm
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.
Mild discomfort possible for arthritic conditions.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Stockholm on August 21 averages 19.9°C with a 25% precipitation probability. Wedding/Outdoor Event Score: 96/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Stockholm Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
August 14
21.1°C • 20% rain
Score
98
August 15
21°C • 20% rain
Score
98
August 18
20.4°C • 21% rain
Score
98
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (August 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Stockholm Worth Visiting on August 21?
Planning a trip to Stockholm 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 19.9°C with a 25% historical precipitation risk.
✈️ Travel Logistics: Approximately 301 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 7 vaccinations are recommended for Sweden, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 21.8°C (swimming pool). Wave conditions are generally lake-like with heights around 0.29m.
📊 Historical Extremes: The hottest August 21 recorded in the last 30 years saw temperatures hit 25°C in 2020, while the coldest dropped to 9.3°C in 2021.