Monthly climate guide
Hiroshima weather in August
Expect hot weather in Hiroshima in August: afternoons reach about 30°C (86°F), while nights drop to around 22°C (71°F). Around 135 mm of rain falls over the month (wet), and skies are often cloudy. Daytime highs are about the same as July and 4°C warmer than September.
What stands out in August
- It's humid — around 83% — so the heat feels heavier.
- Temperatures are falling — expect highs around 4°C lower by September.
- In Hiroshima, August is late summer.
- Hiroshima is usually about 5°C warmer than Sapporo in August.
August is typically Hiroshima's warmest month.
Avg high
30°C
86°F
Avg low
22°C
71°F
Rainfall
135 mm
wet
Humidity
83%
relative
Sky
65%
cloud · often cloudy
Hiroshima weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 6°C / 43°F | -1°C / 29°F | 62 mm | 84% | 74% |
| February | 8°C / 46°F | -1°C / 30°F | 70 mm | 83% | 75% |
| March | 12°C / 54°F | 1°C / 34°F | 103 mm | 80% | 65% |
| April | 17°C / 63°F | 6°C / 42°F | 128 mm | 78% | 64% |
| May | 22°C / 72°F | 11°C / 52°F | 120 mm | 77% | 63% |
| June | 25°C / 77°F | 16°C / 61°F | 239 mm | 83% | 80% |
| July | 29°C / 83°F | 21°C / 70°F | 255 mm | 86% | 74% |
| August | 30°C / 86°F | 22°C / 71°F | 135 mm | 83% | 65% |
| September | 26°C / 78°F | 17°C / 63°F | 200 mm | 84% | 72% |
| October | 21°C / 69°F | 11°C / 52°F | 130 mm | 83% | 62% |
| November | 15°C / 59°F | 6°C / 42°F | 71 mm | 84% | 64% |
| December | 9°C / 47°F | 0°C / 33°F | 87 mm | 84% | 74% |
What to pack for August
- Light, breathable clothing (cotton or linen)
- A sun hat and high-SPF sunscreen
- A refillable water bottle
- A compact umbrella or packable rain jacket
- Water-resistant shoes
- Quick-dry fabrics — it feels stickier than the temperature suggests
Is August a good time to visit Hiroshima?
Compare the months in the chart above to find your ideal window.
Best time to visit Hiroshima →Other Japan cities in August
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Hiroshima weather in August. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/japan/hiroshima/august
<a href="https://weathercompare.eu/weather/japan/hiroshima/august">Hiroshima weather in August</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/japan/hiroshima" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Hiroshima weather in August"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/japan/hiroshima/august">Hiroshima weather in August</a> – WeatherCompare</p>
Hiroshima in August: quick answers
Is August a good time to visit Hiroshima?
August is one of the wetter months in Hiroshima, with about 135 mm of rain. You can still go: pack a rain jacket and keep plans flexible.
How warm is Hiroshima in August?
Average highs are about 30°C (86°F) and average lows about 22°C (71°F), based on 10 years of daily data.
Does it rain a lot in Hiroshima in August?
Hiroshima typically gets around 135 mm of rain in August — wet.
Figures are long-term averages for the area around Hiroshima (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.