April 25 is statistically one of the best days of the year in Istanbul. With minimal rain risk (12%) and pleasant highs of 18°C, it's ideal for outdoor adventures. You'll enjoy Istanbul with reasonable crowd levels and competitive accommodation options.
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Essential Travel Info for Istanbul
Currency
TRY
₺ Turkish lira
Language
Turkish
Driving
Right side
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Safety
Travel Precautions
GPI: 2.785
Istanbul Weather Forecast for April 25
"Mild & Comfortable. Expect average highs of 17.5°C. 12% chance of rain."
What to Wear in Istanbul in April
Based on historical data for April 25, Istanbul typically experiences temperatures between 9.9°C and 17.5°C. We recommend packing light jacket, long pants to stay comfortable. Trends suggest it will stay mostly dry (12% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Istanbul
Smart Suitcase
- Light Jacket
- Long Pants
Average High
17.5°C
Daytime Peak
Average Low
9.9°C
Nighttime Low
Feels Like
17.5°C
🌤️ Feels accurate
Rain Chance
12%
Avg 0.5mm if it rains
Cloud Cover
49%
Overcast
Pressure
1015.1 hPa
Medium volatility
Istanbul Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 87% of the time. Safe to plan outdoor activities with confidence.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 30 recommended
06:00 - 10:00
16:00 - 19:00
Type I-II
🔴 18 min to burn
Type III-IV
🟡 27 min to burn
Type V-VI
🟢 45 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
13.2°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 Turkey
Flight Traffic
Moderate
58/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~743
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Istanbul
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:11
☀️ Noon
13:03
🌇 Sunset
19:54
⏱️ Daylight
13h 42m
Wind Speed
17.2 km/h
Gentle breeze
Sunshine
10.3 hrs
Direct Sun (Cloud-free)
Humidity
76%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Istanbul
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Istanbul
Travel Comfort Index
Real-time tourism conditions
Weather Quality
☀️ Excellent
Tourist Crowds
🟡 Busy
Price Level
💰💰 Moderate
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Weather unlikely to affect joint pain.
Moderate fish activity expected.
Air quality is acceptable. Sensitive individuals should limit prolonged outdoor exertion.
Regional Safety Profile
Seismic Activity
Moderate seismic activity. Occasional tremors possible.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Istanbul on April 25 averages 17.5°C with a 12% precipitation probability. Wedding/Outdoor Event Score: 99/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Istanbul Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
April 27
17.7°C • 13% rain
Score
100
April 28
17.8°C • 12% rain
Score
100
April 29
18.1°C • 11% rain
Score
100
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (April 25) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Istanbul Worth Visiting on April 25?
Planning a trip to Istanbul on April 25? 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 17.5°C with a 12% historical precipitation risk.
✈️ Travel Logistics: Approximately 743 landing slots available daily during this period, indicating peak tourist activity.
💉 Health Advisory: 7 vaccinations are recommended for Turkey, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 12.4°C (polar plunge). Wave conditions are generally lake-like with heights around 0.32m.
📊 Historical Extremes: The hottest April 25 recorded in the last 30 years saw temperatures hit 24.8°C in 2018, while the coldest dropped to 4.6°C in 2017.