April weather forecastNaha, Japan

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.