August weather forecast and climate
Shanghai, China

August, the last month of the summer, in Shanghai, is another hot month, with average temperature ranging between min 25.8°C (78.4°F) and max 31.5°C (88.7°F).

Temperature

In Shanghai, China, the average high-temperature in August is almost the same as in July - a still tropical 31.5°C (88.7°F). The average low-temperature, in August, is 25.8°C (78.4°F).

Heat index

In August, the average heat index is calculated to be a scorching 41.8°C (107.2°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature', 'apparent temperature', 'feels like', or 'real feel', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, pregnancy, clothing), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in Shanghai, China, is 78%.

Rainfall

August is the month with the most rainfall. Rain falls for 12.3 days and accumulates 213.7mm (8.41") of precipitation.

Sea temperature

August is the month with the warmest seawater in Shanghai, China, with an average sea temperature of 27°C (80.6°F).
Note: For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

Daylight

In Shanghai, the average length of the day is 13.3h.

Sunshine

In August, the average sunshine is 6h.

UV index

Months with the highest UV index in Shanghai, China, are June through August, with an average maximum UV index of 11. A UV Index estimate of 11, and higher, represents an excessive health risk from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 11 in August transform into the following instructions:
Practice all-important precautions. Light skin people may get burned in less than 5 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.