August weather forecast
Chiang Rai, Thailand

August, the last month of the summer in Chiang Rai, is another hot month, with an average temperature varying between 23.3°C (73.9°F) and 30.9°C (87.6°F).

Temperature

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

Heat index

In August, the average heat index is estimated at an extremely hot 42°C (107.6°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. With exposure to direct sunlight, the heat index may be increased 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 activity, metabolic differences, pregnancy, and wind affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. 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.
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. 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

With an average relative humidity of 84%, August is the most humid month in Chiang Rai.

Rainfall

August is the month with the most rainfall in Chiang Rai. Rain falls for 24 days and accumulates 358mm (14.09") of precipitation.

Daylight

The average length of the day in August in Chiang Rai is 12h and 48min.
On the first day of the month, sunrise is at 05:56 and sunset at 18:57. On the last day of August, sunrise is at 06:04 and sunset at 18:37 +07.

Sunshine

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

UV index

The months with the highest UV index are March through September, with an average maximum UV index of 12. A UV Index estimate of 11, and higher, represents an ultimate health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In August, the average maximum UV index of 12 translate into the following recommendations:
Practice all essential precautions. Protection against sun damage is crucial. 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.