The depiction of
August in
Fukuoka is often that of a hot summer month. A unique facet of the month is the slightly tapering rainfall after
July's deluge. Festivities continue unabated in the height of summer, despite the temperature peaking at 31.6°C (88.9°F). The air is thick with humidity, particularly in the afternoons, when the heat is most oppressive.
September's approach heralds a reduction in temperature and humidity levels.
Temperature
The warmest month is August, with an average high-temperature of 31.6°C (88.9°F) and an average low-temperature of 24.5°C (76.1°F).
Heat index
The heat index in August is calculated to be an extremely hot 41°C (105.8°F). Greater preventive actions are needed, heat exhaustion and heat cramps are likely. Persistent activity could provoke heatstroke.
It is important to note that the heat index values are for shaded areas and light wind scenarios. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', unifies temperature and humidity readings to offer a comprehensive feel of warmth. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Consider that direct sun exposure can intensify the felt heat, adding potentially 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are essentially critical for children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
Perspiration, followed by sweat evaporation, is the human body's chief method to maintain a balanced temperature. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. Excessive heat gain, when not shed effectively by the body, can result in increasing body temperatures and related hazards.
Humidity
In Fukuoka, the average relative humidity in August is 74%.
Rainfall
In August, the rain falls for 10.4 days. Throughout August, 188mm (7.4") of precipitation is accumulated. Throughout the year, in Fukuoka, there are 128.6 rainfall days, and 1632mm (64.25") of precipitation is accumulated.
Snowfall
April through
December are months without snowfall in Fukuoka.
Sea temperature
The month with the warmest seawater in Fukuoka is August, with an average sea temperature of 27.7°C (81.9°F).
Note: For engaging in water activities including swimming and diving, temperatures from 25°C (77°F) to 29°C (84.2°F) are perceived as perfect, providing pleasure for extended durations.
Daylight
In Fukuoka, the average length of the day in August is 13h and 23min.
On the first day of the month, sunrise is at 05:30 and sunset at 19:18. On the last day of August, in Fukuoka,
Japan, sunrise is at 05:51 and sunset at 18:45 JST.
Sunshine
August has the most sunshine of the year, with an average of 6.4h of sunshine.
UV index
The average daily maximum UV index in August is 10. A UV Index of 8 to 10 symbolizes a very high health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: An average maximum UV index of 10 in August leads to these recommendations:
Taking safety measures is non-negotiable; skin and eyes can be swiftly affected if neglected. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. After every outdoor workout or swim, liberally apply and frequently reapply a broad-spectrum SPF 30+ sunscreen. Notice! Sand and water reflections contribute to a stronger UV exposure.