March 21 is generally a great time to visit Piran. While there is a slight chance of rain (16%), showers are usually brief. Expect comfortable 13°C weather. Moderate travel demand makes this an excellent time for a balanced Piran experience.
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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 March 21
"Mild & Comfortable. Expect average highs of 12.6°C. 16% chance of rain."
What to Wear in Piran in March
Based on historical data for March 21, Piran typically experiences temperatures between 6.1°C and 12.6°C. We recommend packing heavy coat, scarf, gloves to stay comfortable. Trends suggest it will stay mostly dry (16% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Piran
Smart Suitcase
- Heavy Coat
- Scarf
- Gloves
Average High
12.6°C
Daytime Peak
Average Low
6.1°C
Nighttime Low
Feels Like
11.9°C
🌤️ Feels accurate
Rain Chance
16%
Avg 1mm if it rains
Cloud Cover
50%
Overcast
Pressure
1018.6 hPa
High volatility
Piran Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 98% 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
🔴 30 min to burn
Type III-IV
🟡 45 min to burn
Type V-VI
🟢 75 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
7.7°C
Dry air
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
Moderate
59/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~19
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Piran
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:08
☀️ Noon
12:14
🌇 Sunset
18:19
⏱️ Daylight
12h 10m
Wind Speed
15.5 km/h
Gentle breeze
Sunshine
9.3 hrs
Direct Sun (Cloud-free)
Humidity
72%
Humid / Damp
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
🟢 Moderate
Price Level
💰💰 Moderate
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
Rare minor tremors. Buildings are earthquake-resistant.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Piran on March 21 averages 12.6°C with a 16% precipitation probability. Wedding/Outdoor Event Score: 84/100."
— 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
March 19
12.4°C • 14% rain
Score
88
March 28
13.8°C • 26% rain
Score
87
March 27
13.4°C • 28% rain
Score
85
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (March 21) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Piran Worth Visiting on March 21?
Planning a trip to Piran on March 21? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year offers a bracing seasonal atmosphere averaging 12.6°C with a 16% historical precipitation risk.
✈️ Travel Logistics: Approximately 19 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 12°C (polar plunge). Wave conditions are generally lake-like with heights around 0.18m.
📊 Historical Extremes: The hottest March 21 recorded in the last 30 years saw temperatures hit 15.9°C in 2019, while the coldest dropped to 1.9°C in 2021.