August weather forecast
Nagasaki, Japan

In Nagasaki, Japan, August suffers the highest average high temperature of 31.7°C (89.1°F) and a low of 25.1°C (77.2°F). Despite the heat, it is a popular month for beachgoers, especially with the sea temperature at a year-high average of 27.7°C (81.9°F). However, rainfall recedes to 195mm (7.68"), indicating the gradual easing of the monsoon season. In spite of the extreme temperatures, August remains an active month in Nagasaki. As the city transitions from August into September, temperatures start to drop slightly, marking the gradual end of the summer.

Temperature

The average temperatures reach their apex in August, averaging 31.7°C (89.1°F) at the high end and 25.1°C (77.2°F) at the low end.

Heat index

The heat index for August is appraised at a scorching 41°C (105.8°F). Apply extra caution, heat cramps and heat exhaustion could happen. Heatstroke might occur with long-duration activity.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', binds temperature metrics with humidity values to give a sense of the actual warmth. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. In conditions of both high temperature and humidity (a high heat index), sweating is limited and the perception of heat is enhanced. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

The average relative humidity in August in Nagasaki, Japan, is 75%.

Rainfall

In August, in Nagasaki, the rain falls for 9.8 days. Throughout August, 195mm (7.68") of precipitation is accumulated. Throughout the year, in Nagasaki, there are 124.7 rainfall days, and 1858mm (73.15") of precipitation is accumulated.

Snowfall

March through November are months without snowfall in Nagasaki.

Sea temperature

August is the month with the warmest seawater in Nagasaki, Japan, with an average sea temperature of 27.7°C (81.9°F).
Note: For activities such as swimming and diving, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as particularly pleasant and satisfying for prolonged periods without feeling uneasy.

Daylight

In Nagasaki, Japan, the average length of the day in August is 13h and 20min.
On the first day of the month, sunrise is at 05:34 and sunset at 19:19. On the last day of August, sunrise is at 05:54 and sunset at 18:46 JST.

Sunshine

The month with the most sunshine in Nagasaki is August, with an average of 6.8h of sunshine.

UV index

July and August, with an average maximum UV index of 11, are months with the highest UV index. A UV Index value of 11, and more, symbolizes an ultimate health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: An average maximum UV index of 11 in August leads to these recommendations:
Employ every crucial safety step. Those with fair skin could experience burns in a matter of minutes. Stay out of direct sunlight and seek shade between 10 a.m. and 4 p.m., when UV radiation is strongest, but remember that shade devices may not offer full sun protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Ensure the liberal application and reapplication of a broad-spectrum SPF 30+ sunscreen after each outdoor activity or swim, and every two hours. Alert! UV radiation becomes sharper due to reflections from sand and water.