April weather forecast
Hiroshima, Japan

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Weather in April

In April, the weather in Hiroshima enters firmly into spring mode, with a more pleasant climate and no snowfall occurrence. The rising temperatures create a vibrant atmosphere, adding to the vibrance of the city’s iconic cherry blossom season. Despite the burgeoning spring, April sees more rainfall than the previous month, with frequent, albeit not heavy, showers. Hiroshima sees a moderate rise in humidity in April, hinting at the approaching summer months. Daylight also becomes more prevalent, offering more opportunities for exploration and sightseeing in the city.

Temperature

Hiroshima's weather shows a temperature rise with the arrival of April, moving from a moderate 14°C (57.2°F) in March to an enjoyable 19.7°C (67.5°F). An average nighttime temperature of 9.9°C (49.8°F) is recorded in Hiroshima during April.

Humidity

With an average relative humidity of 63%, April is the least humid month.

Rainfall

In April, in Hiroshima, Japan, the rain falls for 15 days. Throughout April, 142mm (5.59") of precipitation is accumulated. In Hiroshima, during the entire year, the rain falls for 190 days and collects up to 1538mm (60.55") of precipitation.

Snowfall

April through November are months without snowfall.

Sea temperature

In Hiroshima, the average seawater temperature in April is 14.3°C (57.7°F).
Note: Swimming in 14.3°C (57.7°F) is deemed hazardous. Exposure to temperatures below 10°C (50°F) leads to immediate severe cold shock and hyperventilation.

Daylight

In April, the average length of the day in Hiroshima is 13h and 3min.
On the first day of the month, sunrise is at 05:56 and sunset at 18:31. On the last day of April, in Hiroshima, sunrise is at 05:21 and sunset at 18:53 JST.

Sunshine

In Hiroshima, the average sunshine in April is 6.3h.

UV index

In April, the average daily maximum UV index is 8. A UV Index value of 8 to 10 symbolizes a very high threat to health from exposure to the Sun's UV rays for the average person.
Note: A typical high UV index of 8 in April suggests the following recommendations:
Skin and eyes are vulnerable without protection. Ensure you always take precautions. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
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Frequently asked questions

What are April temperatures in Hiroshima?

The average high-temperature, in April, in Hiroshima, is 19.7°C (67.5°F), while the average low-temperature is 9.9°C (49.8°F).

What is the least humid month in Hiroshima?

The least humid month in Hiroshima is April, with an average relative humidity of 63%.

What is the average humidity in April in Hiroshima?

In Hiroshima, Japan, the average relative humidity in April is 63%.

How many days does it rain in April in Hiroshima?

In April, in Hiroshima, the rain falls for 15 days. Throughout April, 142mm (5.59") of precipitation is accumulated.

When it does not snow in Hiroshima?

In Hiroshima, Japan, snow does not fall in April through November.

Does it snow in Hiroshima in April?

In April, it doesn't snow. March is the latest month when it typically snows.

What is the water temperature in April in Hiroshima?

In Hiroshima, Japan, the average seawater temperature in April is 14.3°C (57.7°F). Swimming in 14.3°C (57.7°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the average length of the day in April in Hiroshima?

In April, the average day length is 13h and 3min.

When are sunrise and sunset in April in Hiroshima?

On the first day of April in Hiroshima, Japan, sunrise is at 05:56 and sunset at 18:31. On the last day of the month, sunrise is at 05:21 and sunset at 18:53 JST.

How long on average sun shines in April in Hiroshima?

In Hiroshima, the average sunshine duration in April is 6.3h.

What is the UV index reading in April in Hiroshima?

In Hiroshima, the average daily maximum UV index in April is 8. A UV Index reading of 8 to 10 represents a very high health vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average UV index

Average temperature in April
Hiroshima, Japan

Average temperature in April - Hiroshima, Japan
  • Average high temperature in April: 19.7°C

The warmest month (with the highest average high temperature) is August (32.5°C).
The month with the lowest average high temperature is January (9.7°C).

  • Average low temperature in April: 9.9°C

The month with the highest average low temperature is August (24.8°C).
The coldest month (with the lowest average low temperature) is January (1.7°C).

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Average humidity in April
Hiroshima, Japan

Average humidity in April - Hiroshima, Japan
  • Average humidity in April: 63%

The month with the highest relative humidity is July (74%).
The month with the lowest relative humidity is April (63%).

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Average rainfall in April
Hiroshima, Japan

Average rainfall in April - Hiroshima, Japan
  • Average rainfall in April: 141.7mm

The wettest month (with the highest rainfall) is July (258.6mm).
The driest month (with the least rainfall) is December (41.2mm).

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Average rainfall days in April
Hiroshima, Japan

Average rainfall days in April - Hiroshima, Japan
  • Average rainfall days in April: 15 days

The month with the highest number of rainy days is January (19 days).
The month with the least rainy days is October (12 days).

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Average snowfall in April
Hiroshima, Japan

Average snowfall in April - Hiroshima, Japan
  • Average snowfall in April: 0mm

The month with the highest snowfall is January (50mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).

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Average snowfall days in April
Hiroshima, Japan

Average snowfall days in April - Hiroshima, Japan
  • Average snowfall days in April: 0 days

The month with the highest number of snowfall days is January (8.7 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average sea temperature in April
Hiroshima, Japan

Average sea temperature in April - Hiroshima, Japan
  • Average sea temperature in April: 14.3°C

The best month for swimming (with the highest average sea temperature) is August (26.8°C).
The coldest month (with the lowest average sea temperature) is February (12.4°C).

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Average daylight in April /
Average sunshine in April
Hiroshima, Japan

Average daylight in April / Average sunshine in April - Hiroshima, Japan
  • Average daylight in April: 13h and 1min

The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in April: 6h and 2min

The month with the most sunshine is August (Average sunshine: 6h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).

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Average UV index in April
Hiroshima, Japan

Average UV index in April - Hiroshima, Japan
  • Average UV index in April: 8

The month with the highest UV index is July (UV index 11).
The months with the lowest UV index are January and December (UV index 3).

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Hiroshima, Japan

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