The hottest month in Kume Island is July when the average maximum temperature is 32°, average temperature is 29° and average minimum temperature is 28°.
The coolest month in Kume Island is January when the average maximum temperature is 19°, average temperature is 17° and average minimum temperature is 16°.
The longest days in Kume Island are in June, with an average of 13.8 hours of daylight per day. December has the shortest days with an average of 10.5 hours of daylight per day.
The sunniest days in Kume Island are in June which has the most hours of sunshine per day with an average of 8.3 hours of sunshine per day, making it a sunny month with few clouds. December has the least sunshine with an average of 5.1 hours of sunshine per day, making it a sunny month that is overcast at times.
The ultraviolet index is the highest in July when it reaches 12.7 and lowest in December when it reaches 5.3.
An ultraviolet index reading above 11 indicates an extreme risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 10 minutes. Take all precautions because unprotected skin and eyes can burn in minutes. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.
The warmest sea water temperatures in Kume Island are found in July when they peak at 29° and lowest in February when they dip to 22°.
The sea is best for swimming between June and December when the temperature is above 25° which is warm and pleasant for relaxing and swimming for long periods.
The wettest month in Kume Island is June with 3.2cm of rain and the most days of rain with 16.8 days with some rain, a wet time to visit the beach.
The driest month in Kume Island is September with 0.6cm of rain and July has the fewest days of rain with 8.4 days with some rain, a dry time to visit the beach.
The most humid month in Kume Island is July with a dew point (an indicator of humidity) of 26° which is very uncomfortable and fairly oppressive unless you are on a beach. At night you would most likely require airconditioning.
The least humid month in Kume Island is January with a dew point of 13° which is very comfortable.
The most windy month in Kume Island is March when the average maximum windspeed is 31kmh and the average wind speed is 23kmh.
The least windy month in Kume Island is May when the average maximum windspeed is 26kmh and the average wind speed is 19kmh.