August weather forecast and climate
Chiang Rai, Thailand

The last month of the summer, August, is another tropical month in Chiang Rai, Thailand, with average temperature ranging between max 30.9°C (87.6°F) and min 23.3°C (73.9°F).

Temperature

In August, the average high-temperature is practically the same as in July - a still tropical 30.9°C (87.6°F). The average low-temperature, in Chiang Rai, is 23.3°C (73.9°F).

Heat index

In August, the average heat index is estimated at a blistering 42°C (107.6°F). Beware - heat cramps and heat exhaustion are very likely. Heatstroke is imminent with prolonged 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', 'real feel', 'apparent temperature', or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like differences in body mass, height, and shape, metabolic differences, wind, and activity influence one's weather impression. 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. 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.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. 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. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 37.5°C (99.5°F) to 38.3°C (100.9°F), thermal conditions are potentially life-threatening.

Humidity

August is the most humid month, with an average relative humidity of 84%.

Rainfall

The month with the most rainfall in Chiang Rai is August when the rain falls for 24 days and typically aggregates up to 358.4mm (14.1") of precipitation.

Daylight

The average length of the day in August is 12.8h.

Sunshine

June through August, with an average of 5h of sunshine, are months with the least sunshine.

UV index

March through September, with an average maximum UV index of 12, are months with the highest UV index in Chiang Rai. A UV Index value of 11, and more, symbolizes an extreme health hazard from the exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 12 in August interpret into the following advice:
Take all necessary precautions, as unprotected skin can burn in 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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. 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.