Today's Weather Forecast - Hiroshima

Today's weather in Hiroshima. high 28°C (82°F), low 22°C (72°F). Mainly Clear.

Today’s Hourly Weather Outlook

Morning6 AM – Noon24°
Wind speed
4 km/h
Rain probability
41%
AfternoonNoon – 6 PM28°
Wind speed
5 km/h
Rain probability
6%
Evening6 PM – Midn26°
Wind speed
6 km/h
Rain probability
6%
NightMidn – 6 AM22°
Wind speed
6 km/h
Rain probability
32%

24-Hour Rain & Temperature Forecast

Sunrise & Sunset

Sunrise
Dawn 5:20 AM
Total Daylight
Day completeSolar noon 12:06 PM
Sunset
Dusk 6:53 PM
RemainingDaylight ended
Solar elevation-40°
vs yesterday-3 min

Air Quality Index & Health Advice

Air Quality Index

Air quality level
Good
Dominant pollutant
Dominant: PM10
Monitoring station
Misasamachi, Hiroshima-ken, Japan (三篠小学校広島市西区)
PM2.5
1μg/m³
PM10
13μg/m³
O₃
25.6ppb
NO₂
2.8ppb
SO₂
1.5ppb
CO
3.4ppm
0Good → Hazardous300+

5-Day Weather Forecast

Full 15-Day Forecast

Weather Insight

Hiroshima is forecast to reach a high of 28°C today, with an overnight low around 22°C. That's 1° above the long-term average high of 27°C for this time of year. It continues a recent pattern — 11 of the last 19 days with published data have run warmer than normal. Expect a fair chance of rain (41% probability) and light winds averaging 6 km/h. Air quality is currently Moderate (AQI 68), driven mainly by PM2.5 at 18 μg/m³.

Today vs Normal

28°C+1° above normal

The long-term average high for today is 27°C.

11 of the last 19 days with published data ran above normal.

It continues that pattern - today's forecast is also running above normal.

2026-08-19: 31°C31°2026-08-20: 31°C31°2026-08-21: 31°C31°2026-08-22: 32°C32°2026-08-23: 33°C33°2026-08-24: 32°C32°2026-08-25: 32°C32°2026-08-26: 31°C31°2026-08-27: 31°C31°2026-08-28: 28°C28°2026-08-29: 31°C31°2026-08-30: 32°C32°

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.