April 15 is generally a great time to visit Hiroshima. While there is a slight chance of rain (25%), showers are usually brief. Expect comfortable 18°C weather. Hiroshima is currently in its most popular travel window, meaning vibrant crowds and premium pricing.
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Essential Travel Info for Hiroshima
Currency
JPY
¥ Japanese yen
Language
Japanese
Driving
Left side
Connect
Public wireless LAN is available at publ...
Safety
Very High Safety
GPI: 1.336
Hiroshima Weather Forecast for April 15
"Mild & Comfortable. Expect average highs of 17.8°C. 25% chance of rain."
What to Wear in Hiroshima in April
Based on historical data for April 15, Hiroshima typically experiences temperatures between 8.4°C and 17.8°C. We recommend packing light jacket, long pants 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 Hiroshima
Smart Suitcase
- Light Jacket
- Long Pants
Average High
17.8°C
Daytime Peak
Average Low
8.4°C
Nighttime Low
Feels Like
17.8°C
🌤️ Feels accurate
Rain Chance
25%
Avg 2.6mm if it rains
Cloud Cover
62%
Overcast
Pressure
1014.2 hPa
Medium volatility
Hiroshima 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 30 recommended
05:00 - 10:00
16:00 - 18:00
Type I-II
🔴 19 min to burn
Type III-IV
🟡 29 min to burn
Type V-VI
🟢 48 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
12.9°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
100/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~29
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Hiroshima
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:40
☀️ Noon
12:11
🌇 Sunset
18:42
⏱️ Daylight
13h 1m
Wind Speed
13.2 km/h
Gentle breeze
Sunshine
8.7 hrs
Direct Sun (Cloud-free)
Humidity
73%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Hiroshima
Smart Flight Estimator
Airport-to-Airport Logistics
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Add your home location in settings to see airport details.
Travel Health & Safety in Hiroshima
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.
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, Hiroshima on April 15 averages 17.8°C with a 25% precipitation probability. Wedding/Outdoor Event Score: 90/100."
— Source: 30YearWeather.com|Data: NASA POWER (1991-2021)|View Methodology
Hiroshima Weather History (2010–2024)
Temperature History
Hall of Fame
Records from last 10 years
Better Alternatives Nearby
Consider these dates within ±7 days
April 19
19.1°C • 27% rain
Score
94
April 17
18.5°C • 23% rain
Score
93
April 18
18.7°C • 24% rain
Score
93
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (April 15) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Hiroshima Worth Visiting on April 15?
Planning a trip to Hiroshima on April 15? 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 17.8°C with a 25% historical precipitation risk.
✈️ Travel Logistics: Approximately 29 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 14.2°C (polar plunge). Wave conditions are generally lake-like with heights around 0.2m.
📊 Historical Extremes: The hottest April 15 recorded in the last 30 years saw temperatures hit 20.1°C in 2016, while the coldest dropped to 2.3°C in 2021.