August 9 is generally a great time to visit Helsinki. While there is a slight chance of rain (28%), showers are usually brief. Expect comfortable 20°C weather. Take advantage of the off-peak calm in Helsinki to see the sights without the usual crowds.
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Essential Travel Info for Helsinki
Currency
EUR
€ Euro
Language
Finnish
+1 more
Driving
Right side
Connect
Much of Helsinki is blanketed withWi-Fi ...
Safety
Very High Safety
GPI: 1.439
Helsinki Weather Forecast for August 9
"Mild & Comfortable. Expect average highs of 19.8°C. 28% chance of rain."
What to Wear in Helsinki in August
Based on historical data for August 9, Helsinki typically experiences temperatures between 15.3°C and 19.8°C. We recommend packing light jacket, long pants to stay comfortable. With a 28% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Helsinki
Smart Suitcase
- Light Jacket
- Long Pants
Average High
19.8°C
Daytime Peak
Average Low
15.3°C
Nighttime Low
Feels Like
19.8°C
🌤️ Feels accurate
Rain Chance
28%
Avg 1.7mm if it rains
Cloud Cover
58%
Overcast
Pressure
1013.8 hPa
Medium volatility
Helsinki Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 100% 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
16°C
Noticeable
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 Finland
Flight Traffic
Quiet
29/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~176
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Helsinki
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
04:19
☀️ Noon
12:27
🌇 Sunset
20:34
⏱️ Daylight
16h 14m
Wind Speed
18.5 km/h
Gentle breeze
Sunshine
12.3 hrs
Direct Sun (Cloud-free)
Humidity
79%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Helsinki
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Helsinki
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
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
Zero seismic activity detected in 30 years.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Helsinki on August 9 averages 19.8°C with a 28% precipitation probability. Wedding/Outdoor Event Score: 94/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Helsinki Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (August 9) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Helsinki Worth Visiting on August 9?
Planning a trip to Helsinki on August 9? 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 19.8°C with a 28% historical precipitation risk.
✈️ Travel Logistics: Approximately 176 landing slots available daily during this period, indicating peak tourist activity.
💉 Health Advisory: 8 vaccinations are recommended for Finland, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 20.4°C (refreshing tonic). Wave conditions are generally lake-like with heights around 0.46m.
📊 Historical Extremes: The hottest August 9 recorded in the last 30 years saw temperatures hit 23.2°C in 2018, while the coldest dropped to 12.2°C in 2022.