August weather forecast
Nagoya, Japan

The heat continues in August with the year's highest temperatures hitting Nagoya. The mercury often soars reaching up to 32.8°C (91°F) on average. It is also a humid month, though rains often provide relief from the oppressive heat. The robust sun and abundant daylight hours provide ample time for outdoor activities. Despite the high temperatures, it also represents a decline in rainfall compared to July.

Temperature

With an average high-temperature of 32.8°C (91°F) and an average low-temperature of 24.3°C (75.7°F), August is the warmest month in Nagoya.

Heat index

The heat index value during August is calculated to be a blisteringly hot 43°C (109.4°F). Beware: Heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged activity.
Heat index's context suggests values are appropriate for shady areas and slight breezes. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'apparent temperature' or 'real feel', unifies temperature and humidity readings to offer a comprehensive feel of warmth. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

In August, the average relative humidity in Nagoya is 70%.

Rainfall

In Nagoya, in August, it is raining for 8.7 days, with typically 126mm (4.96") of accumulated precipitation. In Nagoya, during the entire year, the rain falls for 116.3 days and collects up to 1535mm (60.43") of precipitation.

Snowfall

In Nagoya, snow does not fall in March through November.

Sea temperature

With an average sea temperature of 28°C (82.4°F), August is the month with the warmest seawater in Nagoya, Japan.
Note: Swimming, diving, and similar water activities in temperatures ranging from 25°C (77°F) to 29°C (84.2°F) are seen as very agreeable and pleasurable for lengthy periods without discomfort.

Daylight

In Nagoya, the average length of the day in August is 13h and 28min.
On the first day of August, sunrise is at 05:01 and sunset at 18:55. On the last day of the month, sunrise is at 05:24 and sunset at 18:21 JST.

Sunshine

The average sunshine in August is 6.5h.

UV index

June through August, with an average maximum UV index of 10, are months with the highest UV index in Nagoya. A UV Index value of 8 to 10 symbolizes a very high health risk from exposure to the Sun's UV radiation for the average person.
Note: The maximum UV index, 10 during August, leads to the following recommendations:
It is crucial to take precautions; skin and eyes can get damaged if left unprotected. 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. Boost your sun resistance with garments that are densely woven yet spacious. Apply liberally and reapply a broad-spectrum sunscreen of SPF 30+ every two hours, and promptly after any outdoor workout or a swim. Warning! The reflection of sand and water increases the UV dose.