March 21 is generally a great time to visit Nagasaki. While there is a slight chance of rain (30%), showers are usually brief. Expect comfortable 15°C weather. As it's peak season for Nagasaki, we recommend booking your stay well in advance to secure the best rates.
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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 March 21
"Mild & Comfortable. Expect average highs of 14.8°C. 30% chance of rain."
What to Wear in Nagasaki in March
Based on historical data for March 21, Nagasaki typically experiences temperatures between 9.1°C and 14.8°C. We recommend packing light jacket, long pants to stay comfortable. With a 30% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Nagasaki
Smart Suitcase
- Light Jacket
- Long Pants
Average High
14.8°C
Daytime Peak
Average Low
9.1°C
Nighttime Low
Feels Like
14.7°C
🌤️ Feels accurate
Rain Chance
30%
Avg 3.7mm if it rains
Cloud Cover
62%
Overcast
Pressure
1016.7 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 84% 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
🔴 28 min to burn
Type III-IV
🟡 42 min to burn
Type V-VI
🟢 70 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
10°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 Japan
Flight Traffic
High
96/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~46
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Nagasaki
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
06:25
☀️ Noon
12:29
🌇 Sunset
18:33
⏱️ Daylight
12h 8m
Wind Speed
21.9 km/h
Moderate wind
Sunshine
7.7 hrs
Direct Sun (Cloud-free)
Humidity
73%
Humid / Damp
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
⛅ Good
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 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 March 21 averages 14.8°C with a 30% precipitation probability. Wedding/Outdoor Event Score: 91/100."
— 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
Compare Other Cities
Same date (March 21) in other destinations
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📍 Is Nagasaki Worth Visiting on March 21?
Planning a trip to Nagasaki 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 14.8°C with a 30% historical precipitation risk.
✈️ Travel Logistics: Approximately 46 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 14.9°C (polar plunge). Wave conditions are generally fun waves with heights around 1.06m.
📊 Historical Extremes: The hottest March 21 recorded in the last 30 years saw temperatures hit 19.7°C in 2019, while the coldest dropped to 5.2°C in 2024.