April weather forecast
Naha, Japan

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Weather in April

April in Naha signifies the zenith of spring. There is a marked increase in average high and low temperatures indicating the onset of warmer times. The month, characterized by moderate humidity and rainstorms, experiences the same level of rainfall as March, registering 161mm (6.34"). Coincidentally, outdoor enthusiasts can find solace in the fact that daylight lasts for a longer period. Sea temperatures creep up, hinting at ideal conditions for water sports.

Temperature

April in Naha observes an average high-temperature of a moderately hot 24.1°C (75.4°F), marking an insignificant difference from March's 21.7°C (71.1°F). Throughout the nights in April, an average low-temperature of 19°C (66.2°F) is noted.

Humidity

In Naha, the average relative humidity in April is 76%.

Rainfall

In Naha, Japan, during April, the rain falls for 12 days and regularly aggregates up to 161mm (6.34") of precipitation. In Naha, during the entire year, the rain falls for 140.8 days and collects up to 2037mm (80.2") of precipitation.

Sea temperature

In Naha, Japan, the average seawater temperature in April is 22.4°C (72.3°F).
Note: For someone not comfortable with cold, swimming in 22.4°C (72.3°F) waters might be a stretch. However, with favorable conditions like abundant sunshine, mild wind, and warm air temperatures, the experience can be improved. And while wetsuits are not a must, they can be considered.

Daylight

In April, the average length of the day in Naha is 12h and 47min.
On the first day of the month, sunrise is at 06:20 and sunset at 18:46. On the last day of April, in Naha, sunrise is at 05:52 and sunset at 19:00 JST.

Sunshine

The average sunshine in April is 4.1h.

UV index

The average daily maximum UV index in April in Naha is 11. A UV Index estimate of 11, and higher, represents an extreme health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: In April, the maximum UV index of 11 translates into these guidelines:
Ensure all key precautions. Defense against sun exposure is critical. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes. Spending extended time in direct sunlight isn’t recommended, especially if you sunburn easily. Make sure to apply a 30 SPF sunscreen. Stay vigilant! UV rays get a boost in intensity due to sand and water reflections.
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Frequently asked questions

What are April temperatures in Naha?

An average high-temperature, in April, in Naha, is 24.1°C (75.4°F) and the average low-temperature is 19°C (66.2°F).

What is the average humidity in April in Naha?

In April, the average relative humidity in Naha, Japan, is 76%.

How much does it rain in Naha in April?

In Naha, Japan, in April, it is raining for 12 days, with typically 161mm (6.34") of accumulated precipitation.

What is the water temperature in April in Naha?

In April, the average sea temperature in Naha is 22.4°C (72.3°F). Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 22.4°C (72.3°F) water may be enjoyable.

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

In April, the average day length is 12h and 47min.

When are sunrise and sunset in April in Naha?

On the first day of April in Naha, Japan, sunrise is at 06:20 and sunset at 18:46. On the last day of the month, sunrise is at 05:52 and sunset at 19:00 JST.

How long on average sun shines in April in Naha?

In April, the average sunshine duration in Naha is 4.1h.

What is the UV index reading in April in Naha?

In Naha, Japan, the average daily maximum UV index in April is 11. A UV Index reading of 11, and higher, represents an excessive health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in April
Naha, Japan

Average temperature in April - Naha, Japan
  • Average high temperature in April: 24.1°C

The warmest month (with the highest average high temperature) is July (31.8°C).
The month with the lowest average high temperature is January (19.5°C).

  • Average low temperature in April: 19°C

The month with the highest average low temperature is July (26.8°C).
The coldest month (with the lowest average low temperature) is January (14.6°C).

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Average humidity in April
Naha, Japan

Average humidity in April - Naha, Japan
  • Average humidity in April: 76%

The month with the highest relative humidity is June (83%).
The month with the lowest relative humidity is December (66%).

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Average rainfall in April
Naha, Japan

Average rainfall in April - Naha, Japan
  • Average rainfall in April: 161.4mm

The wettest month (with the highest rainfall) is September (260.5mm).
The driest month (with the least rainfall) is December (102.8mm).

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Average rainfall days in April
Naha, Japan

Average rainfall days in April - Naha, Japan
  • Average rainfall days in April: 12 days

The month with the highest number of rainy days is March (13.7 days).
The month with the least rainy days is October (9.5 days).

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Average sea temperature in April
Naha, Japan

Average sea temperature in April - Naha, Japan
  • Average sea temperature in April: 22.4°C

The best month for swimming (with the highest average sea temperature) is August (28.7°C).
The coldest month (with the lowest average sea temperature) is February (20.9°C).

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

Average daylight in April / Average sunshine in April - Naha, Japan
  • Average daylight in April: 12h and 5min

The month with the longest days is June (Average daylight: 13h and 48min).
The month with the shortest days is December (Average daylight: 10h and 30min).

  • Average sunshine in April: 4h and 1min

The month with the most sunshine is July (Average sunshine: 7h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).

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Average UV index in April
Naha, Japan

Average UV index in April - Naha, Japan
  • Average UV index in April: 11

The months with the highest UV index are May, June, July and August (UV index 12).
The month with the lowest UV index is December (UV index 5).

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Naha, Japan

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