July 18 is generally a great time to visit Hiroshima. While there is a slight chance of rain (39%), showers are usually brief. Expect comfortable 29°C weather. Expect a bustling atmosphere in Hiroshima right now—this is when the city truly comes alive with visitors.
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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 July 18
"Warm & Sunny. Expect average highs of 28.9°C. 39% chance of rain."
What to Wear in Hiroshima in July
Based on historical data for July 18, Hiroshima typically experiences temperatures between 22.8°C and 28.9°C. We recommend packing t-shirt, light clothing, umbrella to stay comfortable. With a 39% chance of rain, keeping a raincoat or umbrella handy is a smart move.
Complete Packing Guide
Weekly breakdown & essential items for Hiroshima
Smart Suitcase
- T-Shirt
- Light Clothing
- Umbrella
Average High
28.9°C
Daytime Peak
Average Low
22.8°C
Nighttime Low
Feels Like
35.6°C
🔥 Heat index effect
Rain Chance
39%
Avg 4mm if it rains
Cloud Cover
72%
Light drizzle
Pressure
1009.6 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 87% 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 - 19:00
Type I-II
🔴 17 min to burn
Type III-IV
🟡 26 min to burn
Type V-VI
🟢 43 min to burn
UV estimate based on latitude, season & cloud cover. Actual UV may vary.
Outdoor Comfort
How pleasant is it outside?
Dew Point
26.1°C
Humid/Sticky
Heat Index
35.6°C
Feels hotter
😕 Best outdoor time:
Morning hours (before 11 AM)
Marine Conditions
Marine Life
No special warnings. Enjoy the swim!
Swim Index
✅ Excellent Swimming Conditions
Travel & Logistics Insights
Local Calendar
Business Day
Standard hours in Japan
Flight Traffic
High
93/100 pressure index
Health Advisory
Required
1 vaccine • View Details →
Landing Slots
~27
Daily arrival options (inc. codeshare)
Sunrise, Sunset & Wind in Hiroshima
Daylight & Sun
Solar Elevation Cycle
🌅 Sunrise
05:11
☀️ Noon
12:17
🌇 Sunset
19:23
⏱️ Daylight
14h 11m
Wind Speed
11.6 km/h
Light breeze
Sunshine
9.6 hrs
Direct Sun (Cloud-free)
Humidity
85%
Humid / Damp
Travel Intelligence
Exclusive flight analytics & health data for Hiroshima
Smart Flight Estimator
Airport-to-Airport Logistics
unlock smart flight estimates
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Travel Health & Safety in Hiroshima
Travel Comfort Index
Real-time tourism conditions
Weather Quality
⛅ Good
Tourist Crowds
🔴 Very Busy
Price Level
💰💰💰 Expensive
Health & Wellbeing
Meteo-Health Forecast
Moderate fluctuations. Some sensitivity possible.
Mild discomfort possible for arthritic conditions.
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 July 18 averages 28.9°C with a 39% precipitation probability. Wedding/Outdoor Event Score: 83/100."
— 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
July 24
30.3°C • 26% rain
Score
89
July 25
30.5°C • 27% rain
Score
89
July 22
30.1°C • 28% rain
Score
88
💡 Moving your event by a few days could significantly improve weather conditions
Compare Other Cities
Same date (July 18) in other destinations
🌍 Explore the same date in different destinations around the world
📍 Is Hiroshima Worth Visiting on July 18?
Planning a trip to Hiroshima on July 18? Our historical weather analysis based on 30 years of NASA satellite data shows that this time of year typically offers vibrant summer conditions averaging 28.9°C with a 39% historical precipitation risk.
✈️ Travel Logistics: Approximately 27 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 26.6°C (tropical bath). Wave conditions are generally lake-like with heights around 0.25m.
📊 Historical Extremes: The hottest July 18 recorded in the last 30 years saw temperatures hit 31.9°C in 2018, while the coldest dropped to 19.8°C in 2020.