September 18 is generally a great time to visit Vilnius. While there is a slight chance of rain (23%), showers are usually brief. Expect comfortable 17°C weather. Vilnius is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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Vilnius Weather Forecast for September 18
"Mild & Comfortable. Expect average highs of 16.7°C. 23% chance of rain."
What to Wear in Vilnius in September
Based on historical data for September 18, Vilnius typically experiences temperatures between 9.3°C and 16.7°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (23% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Vilnius
Smart Suitcase
- Light Jacket
- Long Pants
Average High
16.7°C
Daytime Peak
Average Low
9.3°C
Nighttime Low
Feels Like
16.7°C
🌤️ Feels accurate
Rain Chance
23%
Avg 1.1mm if it rains
Cloud Cover
63%
Overcast
Pressure
1016 hPa
High volatility
Vilnius Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
~ Weather is generally predictable, but pack for minor variations. A light backup layer is recommended.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 40 min to burn
Type III-IV
🟡 60 min to burn
Type V-VI
🟢 100 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
12.6°C
Pleasant
Heat Stress
Low
No heat warning
🙂 Best outdoor time:
Any time during daylight hours
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Lithuania
Flight Traffic
High
92/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~55
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Vilnius
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:57
☀️ Noon
12:14
🌇 Sunset
18:31
⏱️ Daylight
12h 33m
Wind Speed
17.4 km/h
Gentle breeze
Sunshine
7.9 hrs
Direct Sun (Cloud-free)
Humidity
77%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Vilnius
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Vilnius
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, Vilnius on September 18 averages 16.7°C with a 23% precipitation probability. Wedding/Outdoor Event Score: 88/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Vilnius Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
September 11
19.2°C • 19% rain
Score
96
September 12
18.8°C • 22% rain
Score
93
September 25
15.6°C • 14% rain
Score
93
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (September 18) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Vilnius Worth Visiting on September 18?
Planning a trip to Vilnius on September 18? 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 16.7°C with a 23% historical precipitation risk.
✈️ Travel Logistics: Approximately 55 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 7 vaccinations are recommended for Lithuania, including COVID-19.
📊 Historical Extremes: The hottest September 18 recorded in the last 30 years saw temperatures hit 24.4°C in 2024, while the coldest dropped to 5.3°C in 2016.