January 18 is generally a great time to visit Istanbul. While there is a slight chance of rain (25%), showers are usually brief. Expect comfortable 9°C weather. 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 January 18
"Mild & Comfortable. Expect average highs of 9.1°C. 25% chance of snow."
What to Wear in Istanbul in January
Based on historical data for January 18, Istanbul typically experiences temperatures between 3.9°C and 9.1°C. We recommend packing heavy coat, scarf, gloves to stay comfortable. Trends suggest it will stay mostly dry (25% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Istanbul
Smart Suitcase
- Heavy Coat
- Scarf
- Gloves
Average High
9.1°C
Daytime Peak
Average Low
3.9°C
Nighttime Low
Feels Like
6.2°C
❄️ Slightly colder
Snow Chance
25%
Avg 1.6mm if it snows
Snowfall
0.3 cm
~25% chance
Pressure
1020 hPa
Medium volatility
Istanbul Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
~ Weather is generally predictable, but pack for minor variations. A light backup layer is recommended.
Sun Exposure
UV Index & Safety Guide
Protection Needed
SPF 15 for extended outdoor time
Type I-II
🔴 267 min to burn
Type III-IV
🟡 401 min to burn
Type V-VI
🟢 668 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
5.7°C
Dry air
Heat Stress
Low
No heat warning
😕 Best outdoor time:
Midday (11 AM - 3 PM) when warmest
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
52/100 pressure index
Health Advisory
Required
2 vaccines • View Details →
Landing Slots
~659
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Istanbul
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
08:26
☀️ Noon
13:15
🌇 Sunset
18:04
⏱️ Daylight
9h 37m
Wind Speed
20.7 km/h
Moderate wind
Sunshine
6.0 hrs
Direct Sun (Cloud-free)
Humidity
79%
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
🟢 Moderate
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 January 18 averages 9.1°C with a 25% precipitation probability. Wedding/Outdoor Event Score: 63/100."
— 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
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (January 18) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Istanbul Worth Visiting on January 18?
Planning a trip to Istanbul on January 18? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year offers a bracing seasonal atmosphere averaging 9.1°C with a 25% historical precipitation risk.
✈️ Travel Logistics: Approximately 659 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 10.3°C (polar plunge). Wave conditions are generally fun waves with heights around 0.72m.
📊 Historical Extremes: The hottest January 18 recorded in the last 30 years saw temperatures hit 17.5°C in 2023, while the coldest dropped to -3.3°C in 2021.