May weather forecast
Naha, Japan

Moving into May, Naha is in the throes of a warm and humid climate. A significant leap in temperatures and substantial rainfall indicates the city's preparation for the upcoming summer. May carries the honor of being the month with the most significant increase in rainfall, a leap from 161mm (6.34") to 232mm (9.13"). Despite the rainfall, the city's vibrant landscape and diversely rich culture render a visit here, a fulfilling experience. A notable increase in sea temperatures further encourages beach visits and water activities.

Temperature

May brings an average high-temperature of a still warm 26.7°C (80.1°F) in Naha, showing a slight difference from April's 24.1°C (75.4°F). May records a small disparity from daytime temperatures, marking an average low-temperature of 21.8°C (71.2°F) in Naha.

Humidity

In May, the average relative humidity is 79%.

Rainfall

In May, the rain falls for 13 days. Throughout May, 232mm (9.13") of precipitation is accumulated. Throughout the year, there are 140.8 rainfall days, and 2037mm (80.2") of precipitation is accumulated.

Sea temperature

In Naha, the average seawater temperature in May is 24.6°C (76.3°F).
Note: For those with a heightened sensitivity to cold, sunshine, wind, and outside temperature make a big difference in enjoying a swim at 24.6°C (76.3°F). (Olympic swimming regulations state a water temperature of 25°C (77°F) to 28°C (82.4°F).)

Daylight

In Naha, Japan, the average length of the day in May is 13h and 26min.
On the first day of May in Naha, sunrise is at 05:51 and sunset at 19:01. On the last day of the month, sunrise is at 05:37 and sunset at 19:17 JST.

Sunshine

In May, the average sunshine in Naha is 4.7h.

UV index

May through August, with an average maximum UV index of 12, are months with the highest UV index. A UV Index of 11, and more, symbolizes an ultimate health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A maximum UV index of 12 in May translates into the following recommendations:
Adopt every precaution of necessity, unprotected skin and eyes may suffer burns instantly. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Every two hours, apply and reapply an SPF 30+ broad-spectrum sunscreen, especially after swimming or engaging in outdoor activities. Alert! Sand and water increase UV exposure due to their reflective properties.