September 20 is generally a great time to visit Tallinn. While there is a slight chance of rain (20%), showers are usually brief. Expect comfortable 15°C weather. As it's peak season for Tallinn, we recommend booking your stay well in advance to secure the best rates.
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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 September 20
"Mild & Comfortable. Expect average highs of 15.2°C. 20% chance of rain."
What to Wear in Tallinn in September
Based on historical data for September 20, Tallinn typically experiences temperatures between 9.4°C and 15.2°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (20% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Tallinn
Smart Suitcase
- Light Jacket
- Long Pants
Average High
15.2°C
Daytime Peak
Average Low
9.4°C
Nighttime Low
Feels Like
15.2°C
🌤️ Feels accurate
Rain Chance
20%
Avg 1.1mm if it rains
Cloud Cover
67%
Overcast
Pressure
1015.3 hPa
High volatility
Tallinn Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
✓ This date historically delivers consistent weather 79% 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
🔴 50 min to burn
Type III-IV
🟡 75 min to burn
Type V-VI
🟢 125 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
11.8°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
❄️ Cold Water Hazard
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Estonia
Flight Traffic
High
95/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~54
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Tallinn
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:01
☀️ Noon
12:15
🌇 Sunset
18:30
⏱️ Daylight
12h 29m
Wind Speed
21.3 km/h
Moderate wind
Sunshine
8.0 hrs
Direct Sun (Cloud-free)
Humidity
80%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Tallinn
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 Tallinn
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Rapid pressure changes detected. High risk for meteosensitive people.
Weather unlikely to affect joint pain.
Fish are active due to pressure changes.
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 September 20 averages 15.2°C with a 20% precipitation probability. Wedding/Outdoor Event Score: 86/100."
— 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
Better Alternatives Nearby
Consider these dates within ±7 days
September 21
14.9°C • 20% rain
Score
95
September 22
14.6°C • 20% rain
Score
94
September 23
14.5°C • 19% rain
Score
94
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (September 20) in other destinations
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🌍 Explore the same date in different destinations around the world
📍 Is Tallinn Worth Visiting on September 20?
Planning a trip to Tallinn on September 20? 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 15.2°C with a 20% historical precipitation risk.
✈️ Travel Logistics: Approximately 54 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 17.2°C (refreshing tonic). Wave conditions are generally fun waves with heights around 0.57m.
📊 Historical Extremes: The hottest September 20 recorded in the last 30 years saw temperatures hit 21°C in 2018, while the coldest dropped to 5°C in 2019.