August 21 is generally a great time to visit Tallinn. While there is a slight chance of rain (29%), showers are usually brief. Expect comfortable 20°C weather. Tallinn is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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Essential Travel Info for Tallinn
Currency
EUR
€ Euro
Language
Estonian
Driving
Right side
Connect
Wi-Fi are available in many public areas...
Safety
High Safety
GPI: 1.662
Tallinn Weather Forecast for August 21
"Mild & Comfortable. Expect average highs of 20.3°C. 29% chance of rain."
What to Wear in Tallinn in August
Based on historical data for August 21, Tallinn typically experiences temperatures between 13.5°C and 20.3°C. We recommend packing light jacket, long pants to stay comfortable. With a 29% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Tallinn
Smart Suitcase
- Light Jacket
- Long Pants
Average High
20.3°C
Daytime Peak
Average Low
13.5°C
Nighttime Low
Feels Like
20.4°C
☀️ Feels accurate
Rain Chance
29%
Avg 1.7mm if it rains
Cloud Cover
59%
Light drizzle
Pressure
1013.6 hPa
Medium volatility
Tallinn Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 91% 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
16.3°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 Estonia
Flight Traffic
High
86/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~49
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Tallinn
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
04:52
☀️ Noon
12:25
🌇 Sunset
19:58
⏱️ Daylight
15h 6m
Wind Speed
18.3 km/h
Gentle breeze
Sunshine
10.8 hrs
Direct Sun (Cloud-free)
Humidity
78%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Tallinn
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Tallinn
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, Tallinn on August 21 averages 20.3°C with a 29% precipitation probability. Wedding/Outdoor Event Score: 94/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Tallinn Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (August 21) in other destinations
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📍 Is Tallinn Worth Visiting on August 21?
Planning a trip to Tallinn 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 20.3°C with a 29% historical precipitation risk.
✈️ Travel Logistics: Approximately 49 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 7 vaccinations are recommended for Estonia, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 19.3°C (refreshing tonic). Wave conditions are generally lake-like with heights around 0.38m.
📊 Historical Extremes: The hottest August 21 recorded in the last 30 years saw temperatures hit 25.8°C in 2022, while the coldest dropped to 9.8°C in 2025.