August 15 is statistically one of the best days of the year in Piran. With minimal rain risk (14%) and pleasant highs of 28°C, it's ideal for outdoor adventures. Expect a bustling atmosphere in Piran right now—this is when the city truly comes alive with visitors. Note: August 15 is Unification of Prekmurje Slovenes with the Mother Nation in Piran, so expect special events, closures, and festive atmosphere.
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Essential Travel Info for Piran
Currency
EUR
€ Euro
Language
Slovene
Driving
Right side
Safety
Very High Safety
GPI: 1.316
Piran Weather Forecast for August 15
"Warm & Sunny. Expect average highs of 28.1°C. 14% chance of rain."
What to Wear in Piran in August
Based on historical data for August 15, Piran typically experiences temperatures between 21.3°C and 28.1°C. We recommend packing t-shirt, light clothing to stay comfortable. Trends suggest it will stay mostly dry (14% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Piran
Smart Suitcase
- T-Shirt
- Light Clothing
Average High
28.1°C
Daytime Peak
Average Low
21.3°C
Nighttime Low
Feels Like
30.5°C
🔥 Feels warmer
Rain Chance
14%
Avg 1mm if it rains
Cloud Cover
36%
Overcast
Pressure
1013.9 hPa
Low volatility
Piran Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 92% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
05:00 - 10:00
16:00 - 19:00
Type I-II
🔴 17 min to burn
Type III-IV
🟡 26 min to burn
Type V-VI
🟢 43 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
21.4°C
Humid/Sticky
Heat Index
30.5°C
Feels hotter
🙂 Best outdoor time:
Any time during daylight hours
Marine Conditions
Jellyfish Warning
High water temps may attract jellyfish swarms.
Swim Index
✅ Excellent Swimming Conditions
Travel & Logistics Insights
Local Calendar
Holiday
Unification of Prekmurje Slovenes with the Mother Nation
Flight Traffic
High
81/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~26
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Piran
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:07
☀️ Noon
12:11
🌇 Sunset
19:16
⏱️ Daylight
14h 8m
Wind Speed
12.5 km/h
Gentle breeze
Sunshine
12.3 hrs
Direct Sun (Cloud-free)
Humidity
67%
Slightly humid
Travel Intelligence
Exclusive flight analytics & health data for Piran
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Piran
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🔴 Very Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Stable conditions. Low risk of headaches.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Rare minor tremors. Buildings are earthquake-resistant.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Piran on August 15 averages 28.1°C with a 14% precipitation probability. Wedding/Outdoor Event Score: 100/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Piran Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Compare Other Cities
Same date (August 15) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Piran Worth Visiting on August 15?
Planning a trip to Piran on August 15? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 28.1°C with a 14% historical precipitation risk.
🎉 Local Event: The date coincides with Unification of Prekmurje Slovenes with the Mother Nation, which may influence local business hours and event availability.
✈️ Travel Logistics: Approximately 26 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 7 vaccinations are recommended for Slovenia, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 26.4°C (tropical bath). Wave conditions are generally lake-like with heights around 0.21m.
📊 Historical Extremes: The hottest August 15 recorded in the last 30 years saw temperatures hit 36.6°C in 2025, while the coldest dropped to 19.4°C in 2019.