Hiroshima Weather in August

August in Hiroshima sees daytime temperatures around 32°C (90°F) and lows of 24°C (75°F) at night. With around 127 mm (5 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in Hiroshima in August

Climate statistics over the past 30 years suggest around 14 days of rain, with 127 mm (5 in) average for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in Hiroshima in August

In August, expect very high temperatures in Hiroshima, with highs of 32°C (90°F) and lows of 24°C (75°F) at night. The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. With overnight lows of 24°C (75°F), evenings and nights remain warm. Light clothing and an open window or fan can help you sleep comfortably. Keep in mind, these temperatures are averages, and some days might be even warmer. Dress suitably to manage the heat.

Sunshine in Hiroshima in August

With approximately 209 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.

Wind Speed in Hiroshima in August

Wind speeds average 2 m/s (4 knots) during August. At this speed, expect light breezes that you can feel on your face and cause leaves to rustle gently. Since this is an average, some days are calmer with barely any wind while others have more noticeable gentle breezes.

If you prefer dry days with pleasant temperatures, April, May, September, October and November typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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For a detailed overview over the year and the best time to visit Japan, check out our Hiroshima's climate page.

Hiroshima Temperature in August

Min Temperature 24°C (75°F)  

Max Temperature 32°C (90°F)  

Chance of Rain 45%  

Precipitation 127 mm (5 in)  

Rainy days 14 days  

Humidity 68%  

Windspeed 2 m/s (4 knots)  

Sunshine 209 hours  

Percentage Sunshine 51%  

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Hiroshima typically stay consistent throughout August, with daily highs averaging around 32°C (90°F). Nights are warm, with lows around 24°C (75°F).

Average temperatures in August

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Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in August

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Historical weather for Hiroshima in August

Browse day-by-day weather records for Hiroshima spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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Hiroshima historical weather extremes in August

The extremes listed below come from historical weather data collected in Hiroshima from 1976 through 2025.

• The warmest day in August was on August 16, 1983, with a maximum of 38°C (100°F).
• Hiroshima experienced its chilliest August day on August 14, 2003, reaching only 23°C (73°F).
• Hiroshima registered its coldest August night on August 22, 2002, with temperatures dropping to 17°C (63°F).

What to Wear in Hiroshima in August

Warm temperatures in August make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Hiroshima in August

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Japan, check out our Hiroshima's climate page.

More climate data for Hiroshima

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Hiroshima climate overview or explore weather in Japan.