January 15 is generally a great time to visit Nagasaki. While there is a slight chance of rain (20%), showers are usually brief. Expect comfortable 10°C weather. Nagasaki is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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Essential Travel Info for Nagasaki
Currency
JPY
¥ Japanese yen
Language
Japanese
Driving
Left side
Safety
Very High Safety
GPI: 1.336
Nagasaki Weather Forecast for January 15
"Mild & Comfortable. Expect average highs of 10.3°C. 20% chance of rain."
What to Wear in Nagasaki in January
Based on historical data for January 15, Nagasaki typically experiences temperatures between 5.8°C and 10.3°C. We recommend packing heavy coat, scarf, gloves to stay comfortable. Trends suggest it will stay mostly dry (20% rain probability), but checking the forecast before heading out is always wise.
Complete Packing Guide
Weekly breakdown & essential items for Nagasaki
Smart Suitcase
- Heavy Coat
- Scarf
- Gloves
Average High
10.3°C
Daytime Peak
Average Low
5.8°C
Nighttime Low
Feels Like
8.3°C
❄️ Minor difference
Rain Chance
20%
Avg 1.6mm if it rains
Cloud Cover
69%
Overcast
Pressure
1022.2 hPa
Medium volatility
Nagasaki Weather Conditions & UV Index
Weather Confidence
30-year variance analysis
Based on 10 years of data
🎯 This date historically delivers consistent weather 89% 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
🔴 200 min to burn
Type III-IV
🟡 300 min to burn
Type V-VI
🟢 500 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
4.9°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 Japan
Flight Traffic
High
92/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~44
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Nagasaki
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
07:24
☀️ Noon
12:30
🌇 Sunset
17:37
⏱️ Daylight
10h 13m
Wind Speed
21.7 km/h
Moderate wind
Sunshine
5.8 hrs
Direct Sun (Cloud-free)
Humidity
69%
Slightly humid
Travel Intelligence
Exclusive flight analytics & health data for Nagasaki
Smart Flight Estimator
Airport-to-Airport Logistics
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Travel Health & Safety in Nagasaki
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.
High pressure may reduce activity.
Air quality is excellent. Perfect for outdoor activities.
Regional Safety Profile
Seismic Activity
Moderate seismic activity. Occasional tremors possible.
Typhoon Risk
Year-round risk present
Travel Alert: This region has elevated natural risks. We recommend registering with your embassy and keeping emergency numbers handy.
"According to 30YearWeather's analysis of 30 years of NASA satellite data, Nagasaki on January 15 averages 10.3°C with a 20% precipitation probability. Wedding/Outdoor Event Score: 70/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Nagasaki Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
January 16
10.4°C • 20% rain
Score
72
January 17
10.4°C • 18% rain
Score
72
January 19
10.4°C • 21% rain
Score
72
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (January 15) in other destinations
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📍 Is Nagasaki Worth Visiting on January 15?
Planning a trip to Nagasaki on January 15? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year offers a bracing seasonal atmosphere averaging 10.3°C with a 20% historical precipitation risk.
✈️ Travel Logistics: Approximately 44 landing slots available daily during this period, indicating manageable crowd levels.
💉 Health Advisory: 8 vaccinations are recommended for Japan, including COVID-19.
🌊 Coastal Conditions: Water temperature averages 16.1°C (polar plunge). Wave conditions are generally fun waves with heights around 1.13m.
📊 Historical Extremes: The hottest January 15 recorded in the last 30 years saw temperatures hit 16°C in 2021, while the coldest dropped to 0.9°C in 2017.