August weather forecast
Kumamoto, Japan

August in Kumamoto city swelters under an intense summer heat with temperatures swinging from a high of 30.4°C (86.7°F) to a low of 23.3°C (73.9°F). The smouldering summer days dominate, making this month one of the hottest in the year. Despite the drop in the number of rainy days, the air remains humid, adding to the perceived heat. With a notable drop in cloud cover, sunbathers may enjoy clear skies. As August rolls into September, brace for a gradual drop in temperature and an increase in precipitation patterns.

Temperature

August, having an average high-temperature of 30.4°C (86.7°F) and an average low-temperature of 23.3°C (73.9°F), is the warmest month.

Heat index

The heat index in August is computed to be a sweltering 38°C (100.4°F). Implement additional preventive actions, heat cramps and heat exhaustion are potential hazards. Heatstroke could follow prolonged activity.
Be aware that heat index ratings are designed for shaded locations and minor breezes. A rise in the heat index by 15 Fahrenheit (8 Celsius) degrees may result from direct sunlight exposure.
Note: The heat index, also known as 'real feel' or 'feels like', is an estimation of the warmth sensation when considering humidity levels. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
To combat high temperatures, the human body perspires and relies on sweat evaporation for cooling. When there is an excess of moisture in the atmosphere, the efficiency of the evaporation process is lessened, leading to less efficient body cooling and a sensation of overheating. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.

Humidity

In Kumamoto, the average relative humidity in August is 78%.

Rainfall

In Kumamoto, during August, the rain falls for 21.7 days and regularly aggregates up to 105mm (4.13") of precipitation. Throughout the year, there are 179.9 rainfall days, and 1028mm (40.47") of precipitation is accumulated.

Snowfall

April through November are months without snowfall.

Sea temperature

With an average sea temperature of 28°C (82.4°F), August is the month with the warmest seawater in Kumamoto.
Note: Water temperatures in the range of 25°C (77°F) to 29°C (84.2°F) are warm and delightful, ensuring comfort during water activities over extended periods.

Daylight

The average length of the day in August in Kumamoto is 13h and 20min.
On the first day of August, sunrise is at 05:31 and sunset at 19:15. On the last day of the month, sunrise is at 05:51 and sunset at 18:43 JST.

Sunshine

With an average of 10.5h of sunshine, August has the most sunshine of the year in Kumamoto, Japan.

UV index

In Kumamoto, Japan, the average daily maximum UV index in August is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 6 in August interprets into the following recommendations:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. The Sun's UV radiation is most intense from 10 a.m. to 4 p.m. Try to avoid direct sun exposure during these hours. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.