May 21 is generally a great time to visit Stockholm. While there is a slight chance of rain (18%), showers are usually brief. Expect comfortable 16°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 May 21
"Mild & Comfortable. Expect average highs of 15.8°C. 18% chance of rain."
What to Wear in Stockholm in May
Based on historical data for May 21, Stockholm typically experiences temperatures between 7.5°C and 15.8°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (18% 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
15.8°C
Daytime Peak
Average Low
7.5°C
Nighttime Low
Feels Like
15.8°C
🌤️ Feels accurate
Rain Chance
18%
Avg 0.9mm if it rains
Cloud Cover
55%
Overcast
Pressure
1014 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 78% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
03:00 - 10:00
16:00 - 20:00
Type I-II
🔴 23 min to burn
Type III-IV
🟡 35 min to burn
Type V-VI
🟢 58 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
10.1°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
❄️ Cold Water Hazard
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Sweden
Flight Traffic
High
96/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~316
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Stockholm
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
03:03
☀️ Noon
11:45
🌇 Sunset
20:27
⏱️ Daylight
17h 23m
Wind Speed
16.1 km/h
Gentle breeze
Sunshine
13.0 hrs
Direct Sun (Cloud-free)
Humidity
69%
Slightly humid
Travel Intelligence
Exclusive flight analytics & health data for Stockholm
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 Stockholm
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 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
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Stockholm on May 21 averages 15.8°C with a 18% precipitation probability. Wedding/Outdoor Event Score: 86/100."
— 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
May 19
15.8°C • 15% rain
Score
92
May 14
14.6°C • 21% rain
Score
90
May 15
14.7°C • 22% rain
Score
90
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (May 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Stockholm Worth Visiting on May 21?
Planning a trip to Stockholm on May 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 15.8°C with a 18% historical precipitation risk.
✈️ Travel Logistics: Approximately 316 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 12.9°C (polar plunge). Wave conditions are generally lake-like with heights around 0.33m.
📊 Historical Extremes: The hottest May 21 recorded in the last 30 years saw temperatures hit 24.3°C in 2018, while the coldest dropped to 0.8°C in 2020.