April weather forecast
Osaka, Japan

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The Osaka Castle, in Osaka, Japan
The Osaka Castle, in Osaka, Japan

Weather in April

April ushers in a more pronounced spring feel in Osaka, characterized by much warmer temperatures, which can get as high as 19.9°C (67.8°F). The sea water starts becoming inviting, slowly heating up from March to April. Compared to previous months, humidity perception is fairly constant. A slight downtrend in monthly rainfall suggests a less wet surrounding, yet the number of rainy days remains almost unchanged. April's weather forms a smooth transition between the colder months at the start of the year and the subsequent warmer months.

Temperature

Osaka in April experiences an increase in the average high-temperature, moving from March's moderate 13.7°C (56.7°F) to a comfortable 19.9°C (67.8°F). Osaka's average low-temperature for the month of April records at a cool 10.7°C (51.3°F).

Humidity

March and April, with an average relative humidity of 59%, are the least humid months in Osaka.

Rainfall

In April, in Osaka, the rain falls for 9.3 days. Throughout April, 104mm (4.09") of precipitation is accumulated. In Osaka, during the entire year, the rain falls for 98.1 days and collects up to 1279mm (50.35") of precipitation.

Snowfall

March through December are months without snowfall in Osaka.

Sea temperature

In April, the average sea temperature in Osaka is 15.6°C (60.1°F).
Note: In water with a temperature of 15.6°C (60.1°F), most people do not enjoy swimming. As the temperature descends from 21°C (69.8°F) to 15°C (59°F), breathing becomes increasingly difficult to control.

Daylight

In April, the average length of the day in Osaka is 13h and 4min.
On the first day of April in Osaka, sunrise is at 05:44 and sunset at 18:19. On the last day of the month, sunrise is at 05:08 and sunset at 18:42 JST.

Sunshine

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

UV index

In Osaka, 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 exposure to the Sun's UV rays for average individuals.
Note: The maximum daily UV index of 8 in April interprets into the following recommendations:
Always use protective measures; unprotected skin might suffer damage in a short span. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Always opt for UVA and UVB-resistant sunglasses on radiant days.
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Frequently asked questions

What is the temperature in April in Osaka?

The high-temperature in Osaka, Japan, during April is 19.9°C (67.8°F) and the low-temperature is 10.7°C (51.3°F).

What is the least humid month in Osaka?

March and April, with an average relative humidity of 59%, are the least humid months in Osaka.

What is the average humidity in April in Osaka?

In Osaka, the average relative humidity in April is 59%.

How many days does it rain in April in Osaka?

In Osaka, in April, during 9.3 rainfall days, 104mm (4.09") of precipitation is typically accumulated.

When it does not snow in Osaka?

March through December are months without snowfall.

What is the sea water temperature in April in Osaka?

In Osaka, the average seawater temperature in April is 15.6°C (60.1°F). Swimming in 15.6°C (60.1°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

How many hours of daylight does Osaka have in April?

The average day length in April in Osaka, Japan, is 13h and 4min.

When is the sunrise / sunset in April in Osaka?

In April, on the first day of the month, sunrise is at 05:44 and sunset at 18:19. On the last day of the month, in Osaka, sunrise is at 05:08 and sunset at 18:42 JST.

How many hours of sunshine does Osaka have in April?

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

What is the UV index intensity in April in Osaka?

In Osaka, Japan, the average daily maximum UV index in April is 8. A UV Index of 8 to 10 symbolizes a very high hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average UV index

Average temperature in April
Osaka, Japan

Average temperature in April - Osaka, Japan
  • Average high temperature in April: 19.9°C

The warmest month (with the highest average high temperature) is August (33.4°C).
The month with the lowest average high temperature is January (9.5°C).

  • Average low temperature in April: 10.7°C

The month with the highest average low temperature is August (25.4°C).
The coldest month (with the lowest average low temperature) is January (2.8°C).

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Average humidity in April
Osaka, Japan

Average humidity in April - Osaka, Japan
  • Average humidity in April: 59%

The month with the highest relative humidity is July (70%).
The months with the lowest relative humidity are March and April (59%).

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Average rainfall in April
Osaka, Japan

Average rainfall in April - Osaka, Japan
  • Average rainfall in April: 103.8mm

The wettest month (with the highest rainfall) is June (184.5mm).
The driest month (with the least rainfall) is December (43.8mm).

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Average rainfall days in April
Osaka, Japan

Average rainfall days in April - Osaka, Japan
  • Average rainfall days in April: 9.3 days

The month with the highest number of rainy days is June (11.2 days).
The month with the least rainy days is December (5.5 days).

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Average snowfall in April
Osaka, Japan

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

The months with the highest snowfall are January and February (10mm).
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0mm).

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Average snowfall days in April
Osaka, Japan

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

The month with the highest number of snowfall days is February (6.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

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Average sea temperature in April
Osaka, Japan

Average sea temperature in April - Osaka, Japan
  • Average sea temperature in April: 15.6°C

The best month for swimming (with the highest average sea temperature) is August (27.7°C).
The coldest months (with the lowest average sea temperature) are February and March (13.9°C).

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

Average daylight in April / Average sunshine in April - Osaka, 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: 7h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

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Average UV index in April
Osaka, Japan

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

The month with the highest UV index is July (UV index 11).
The month with the lowest UV index is December (UV index 2).

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Osaka, Japan

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