May 4 is generally a great time to visit Piran. While there is a slight chance of rain (35%), showers are usually brief. Expect comfortable 19°C weather. As it's peak season for Piran, we recommend booking your stay well in advance to secure the best rates.
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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 May 4
"Mild & Comfortable. Expect average highs of 18.8°C. 35% chance of rain."
What to Wear in Piran in May
Based on historical data for May 4, Piran typically experiences temperatures between 12.8°C and 18.8°C. We recommend packing light jacket, long pants, umbrella to stay comfortable. With a 35% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Piran
Smart Suitcase
- Light Jacket
- Long Pants
- Umbrella
Average High
18.8°C
Daytime Peak
Average Low
12.8°C
Nighttime Low
Feels Like
18.8°C
🌤️ Feels accurate
Rain Chance
35%
Avg 2.5mm if it rains
Cloud Cover
58%
Overcast
Pressure
1013.4 hPa
Medium volatility
Piran Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 93% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
04:00 - 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
14.5°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 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 Piran
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
04:51
☀️ Noon
12:03
🌇 Sunset
19:16
⏱️ Daylight
14h 25m
Wind Speed
14.9 km/h
Gentle breeze
Sunshine
10.8 hrs
Direct Sun (Cloud-free)
Humidity
76%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Piran
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 Piran
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.
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 May 4 averages 18.8°C with a 35% precipitation probability. Wedding/Outdoor Event Score: 90/100."
— 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
Better Alternatives Nearby
Consider these dates within ±7 days
May 8
19°C • 26% rain
Score
95
May 9
19.3°C • 28% rain
Score
95
May 10
19.5°C • 29% rain
Score
95
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (May 4) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Piran Worth Visiting on May 4?
Planning a trip to Piran on May 4? 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 18.8°C with a 35% 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.
🌊 Coastal Conditions: Water temperature averages 16.4°C (polar plunge). Wave conditions are generally lake-like with heights around 0.32m.
📊 Historical Extremes: The hottest May 4 recorded in the last 30 years saw temperatures hit 24.3°C in 2018, while the coldest dropped to 8.5°C in 2021.