Hiroshima monthly weather averages

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Hiroshima

Hiroshima average temperature chart (Celsius) Hiroshima average temperature chart (Fahrenheit)
Average monthly temperatures in Hiroshima (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 7.8 8.5 12 17.6 21.9 25 29.1 30.6 26.6 21.4 15.9 10.7
°F 46.1 47.2 53.6 63.7 71.5 77 84.4 87 79.9 70.5 60.7 51.2

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Hiroshima monthly rainfall chart (mm) Hiroshima monthly rainfall chart (inches)
Average monthly rainfall in Hiroshima (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 58 69 111 161 154 267 249 125 186 105 77 47
inches 2.3 2.7 4.4 6.3 6.1 10.5 9.8 4.9 7.3 4.1 3 1.9
Rainy days 19 18 18 15 14 17 17 14 16 13 13 17

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Hiroshima

Hiroshima average daily sunshine chart
Average daily sunshine Hiroshima
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 4.2 4.6 5.7 6.3 6.9 5.6 6.2 7.2 5.6 6 5.1 4.4

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Hiroshima average minimum / maximum temperatures (Celsius) Hiroshima average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Hiroshima (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 0.4 0.8 3.2 8.6 13.1 17.6 22.4 23.1 19 12.6 7.3 2.6
Max °C 8 8.7 12.2 17.9 22.2 25.2 29.3 30.8 26.8 21.6 16.2 10.9
Min °F 32.7 33.4 37.8 47.4 55.5 63.7 72.2 73.5 66.2 54.7 45.1 36.6
Max °F 39.6 40.5 45.9 55.8 63.7 70.5 78.4 80.4 73.2 62.8 53.1 44.1

Sea temperature

The graph below shows the average sea temperature.

Hiroshima average sea temperature chart (Celsius) Hiroshima average sea temperature chart (Fahrenheit)
Average sea temperature around Hiroshima in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 16.1 14.9 14.8 15.9 18.3 21.5 24.8 27.1 25.9 23.3 20.9 18.3
°F 60.9 58.7 58.6 60.7 65 70.7 76.6 80.8 78.6 73.9 69.6 64.9

Wind speed

The graph below shows the average wind speed.

Hiroshima average winspeed by month (km/h) Hiroshima average winspeed by month (mph)
Average wind speed in Hiroshima (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 11 11 10 9 8 8 8 8 8 9 10 10
mph 7 7 6 6 5 5 5 5 5 6 6 7

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Hiroshima relative humidity averages
Average relative humidity in Hiroshima
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
68% 69% 68% 69% 72% 78% 80% 77% 76% 72% 71% 70%
Hiroshima

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Hiroshima weather stats

Hiroshima weather statistics
Hottest month: August 30.6°C 87.1°F
Driest month: December 47mm 1.9ins
Sunniest month: August 7.2hrs
Coldest month: January 7.8°C 46°F
Wettest month: June 267mm 10.5ins
Warmest sea: August 27.1°C 80.8°F
Map showing location of Hiroshima (34.39627, 132.45937) Hiroshima map pin © Google

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