- Clothing
- Waterproof jacket and umbrella strongly recommended.
Tomorrow's Weather Forecast - Hiroshima
Tomorrow's weather in Hiroshima. high 30°C (86°F), low 23°C (73°F). Drizzle.
Tomorrow’s Outlook
Tomorrow brings a similar temperature to today. Expect heavy rain in the morning and afternoon and evening, with rain chances climbing as high as 92%. That risk lines up with humidity averaging 82% through the day the more moisture in the air, the more readily clouds build into showers. Humidity stays high near 82%, so it will feel muggier and stickier than the temperature alone suggests. Winds stay light and calm, rarely topping 5 km/h. Sunrise is at 5:51 AM and sunset at 6:20 PM, for about 12h 29m of daylight.
- Tomorrow
- 30°/ 23°
- Today29° / 23°
Tomorrow’s Hourly Weather Outlook
Morning6 AM – Noon25°
- Rain probability
- 57%
- Wind speed
- 4 km/h
AfternoonNoon – 6 PM29°
- Rain probability
- 89%
- Wind speed
- 5 km/h
Evening6 PM – Midn27°
- Rain probability
- 92%
- Wind speed
- 3 km/h
NightMidn – 6 AM24°
- Rain probability
- 19%
- Wind speed
- 4 km/h
24-Hour Rain & Temperature Forecast
Tomorrow13 Sep
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Planning Advice for Tomorrow
- Outdoor
- Not ideal for outdoor plans or car washes — heavy rain expected.
- Travel
- Expect traffic slowdowns from wet roads. Allow extra time.
Sunrise & Sunset
Sunrise
Dawn 5:21 AMTotal Daylight
Full day forecastSolar noon 12:05 PM
Sunset
Dusk 6:50 PMvs today-2 min daylight
Sunrise shift1 min later
Sunset shift1 min earlier
5-Day Weather Forecast
Full 15-Day ForecastWeather Insight
Hiroshima is forecast to reach a high of 30°C tomorrow, with an overnight low around 23°C. That's 4° 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 high chance of rain (92% probability) and light winds averaging 5 km/h. Air quality is currently good (AQI 29), with no notable outdoor health concerns.
Today vs Normal
29°C+2° above normal
The long-term average high for today is 27°C.
15 of the last 28 days with published data ran above normal.
It continues that pattern - today's forecast is also running above normal.
Red = above normal, blue = at or below · last 12 days
Air Quality
Air Quality
Good
Air quality is considered satisfactory, and air pollution poses little or no risk. It’s a good day to be active outside.