May 15 is generally a great time to visit Ljubljana. While there is a slight chance of rain (39%), showers are usually brief. Expect comfortable 19°C weather. As it's peak season for Ljubljana, we recommend booking your stay well in advance to secure the best rates.
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Essential Travel Info for Ljubljana
Currency
EUR
€ Euro
Language
Slovene
Driving
Right side
Connect
As of 2025, Ljubljana has excellent 5G a...
Safety
Very High Safety
GPI: 1.316
Ljubljana Weather Forecast for May 15
"Mild & Comfortable. Expect average highs of 18.5°C. 39% chance of rain."
What to Wear in Ljubljana in May
Based on historical data for May 15, Ljubljana typically experiences temperatures between 9.4°C and 18.5°C. We recommend packing light jacket, long pants, umbrella to stay comfortable. With a 39% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Ljubljana
Smart Suitcase
- Light Jacket
- Long Pants
- Umbrella
Average High
18.5°C
Daytime Peak
Average Low
9.4°C
Nighttime Low
Feels Like
18.5°C
🌤️ Feels accurate
Rain Chance
39%
Avg 3mm if it rains
Cloud Cover
68%
Light drizzle
Pressure
1014.5 hPa
Medium volatility
Ljubljana Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
❓ Expect variable conditions. Have flexible plans and pack for multiple weather scenarios.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
04:00 - 10:00
16:00 - 19:00
Type I-II
🔴 19 min to burn
Type III-IV
🟡 29 min to burn
Type V-VI
🟢 48 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
14.4°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 Slovenia
Flight Traffic
High
84/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~27
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Ljubljana
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
04:31
☀️ Noon
11:59
🌇 Sunset
19:27
⏱️ Daylight
14h 56m
Wind Speed
12.4 km/h
Gentle breeze
Sunshine
9.5 hrs
Direct Sun (Cloud-free)
Humidity
77%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Ljubljana
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 Ljubljana
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
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.
Unhealthy for sensitive groups. Consider wearing a mask outdoors.
Regional Safety Profile
Seismic Activity
Moderate seismic activity. Occasional tremors possible.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Ljubljana on May 15 averages 18.5°C with a 39% precipitation probability. Wedding/Outdoor Event Score: 85/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Ljubljana Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
May 20
19.9°C • 30% rain
Score
95
May 21
20.1°C • 32% rain
Score
94
May 19
19.5°C • 32% rain
Score
92
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (May 15) in other destinations
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📍 Is Ljubljana Worth Visiting on May 15?
Planning a trip to Ljubljana on May 15? 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 18.5°C with a 39% historical precipitation risk.
✈️ Travel Logistics: Approximately 27 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 7 vaccinations are recommended for Slovenia, including COVID-19.
📊 Historical Extremes: The hottest May 15 recorded in the last 30 years saw temperatures hit 25.4°C in 2022, while the coldest dropped to 3.8°C in 2019.