- Clothing
- Light waterproof jacket with an umbrella is a smart choice.
Tomorrow's Weather Forecast - Hiroshima
Tomorrow's weather in Hiroshima. high 29°C (84°F), low 23°C (73°F). Drizzle.
Tomorrow’s Outlook
Tomorrow will be 2°C warmer than today. Showers are likely, with rain probability peaking near 44%. That risk lines up with humidity averaging 77% through the day the more moisture in the air, the more readily clouds build into showers. Humidity stays high near 77%, so it will feel muggier and stickier than the temperature alone suggests. Winds stay light and calm, rarely topping 7 km/h. Sunrise is at 5:50 AM and sunset at 6:21 PM, for about 12h 31m of daylight.
- Tomorrow
- 29°/ 23°
- Today27° / 22°
Tomorrow’s Hourly Weather Outlook
Morning6 AM – Noon24°
- Rain probability
- 10%
- Wind speed
- 6 km/h
AfternoonNoon – 6 PM28°
- Rain probability
- 44%
- Wind speed
- 4 km/h
Evening6 PM – Midn26°
- Rain probability
- 43%
- Wind speed
- 3 km/h
NightMidn – 6 AM23°
- Rain probability
- 0%
- Wind speed
- 7 km/h
24-Hour Rain & Temperature Forecast
Tomorrow12 Sep
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Planning Advice for Tomorrow
- Outdoor
- Outdoor plans may need flexibility; showers are likely.
- Travel
- Wet roads may slow traffic; allow a little extra time.
Sunrise & Sunset
Sunrise
Dawn 5:20 AMTotal Daylight
Full day forecastSolar noon 12:06 PM
Sunset
Dusk 6:51 PMvs today-2 min daylight
Sunrise shiftSame time
Sunset shift2 min earlier
5-Day Weather Forecast
Full 15-Day ForecastWeather Insight
Hiroshima is forecast to reach a high of 29°C tomorrow, with an overnight low around 23°C. That's 3° above the long-term average high of 26°C for this time of year. It continues a recent pattern — 15 of the last 28 days with published data have run warmer than normal. Expect a fair chance of rain (44% probability) and light winds averaging 7 km/h. Air quality is currently Moderate (AQI 60), driven mainly by PM2.5 at 12 μg/m³.
Today vs Normal
27°C0° below normal
The long-term average high for today is 27°C.
15 of the last 28 days with published data ran above normal.
That's a break from the pattern - today's forecast runs below normal even though the recent stretch mostly ran above.
Red = above normal, blue = at or below · last 12 days
Air Quality
Air Quality
Moderate
Air quality is acceptable for most people. Unusually sensitive individuals should consider reducing prolonged or heavy outdoor exertion.