Hiroshima weather

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Usually in January
- 8
- 0
- 4
Weather by month
Now Today
- 13
- 2
5-day forecast

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Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

The weather guide for Hiroshima, Japan shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by MeteoBlue. Find out more about our data sources.

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Which is the hottest month in Hiroshima?

The hottest time of year in Hiroshima is normally August. Expect maximum daytime temperatures to reach 31°C with very high heat and humidity.

Which month has the most rain in Hiroshima?

In terms of rainfall, June is usually the wettest month in Hiroshima with 267mm on average. There are normally 17 days in June with some rain.

When is it sunniest in Hiroshima?

The sunniest time of year in Hiroshima is normally August with bright sunshine on average for 51% of daylight hours; that's 7 hours of sunshine per day.

When is the sea warmest in Hiroshima?

The sea is usually at its warmest in Hiroshima in August when the water temperature reaches 26°C.

Metric (°C / mm) | Imperial (°F / inches)

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Compare Hiroshima weather with the USA

Below the Hiroshima weather chart shows average maximum daytime temperature for Hiroshima, Japan and the USA (Washington).

Maximum daytime temperature (°C)

Hiroshima, Japan

USA (Washington)

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Metric (°C / mm) | Imperial (°F / inches)

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Tropical storm risk: Hiroshima, Japan typhoon season

% of month affected by tropical storms

1.6%

3.1%

5.7%

5.1%

1.2%

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

The Hiroshima, Japan tropical storm risk chart above shows the typhoon season. The chart was processed from data supplied by the US Meteorological Agency (NOAA). Find out more about our data sources.

More about tropical storms

Where's hot in Japan right now?

Below are the temperatures expected today at popular destinations in Japan. Select a destination to compare today's forecast with average weather conditions.