September weather forecast
Wiang Sa, Thailand

September, the first month of the autumn in Wiang Sa, is still a hot month, with temperature in the range of an average low of 23.7°C (74.7°F) and an average high of 30.8°C (87.4°F).

Temperature

At the start of September, Wiang Sa's average high-temperature reaches a still tropical 30.8°C (87.4°F), subtly different from the preceding month. During September, the nighttime temperature in Wiang Sa averages to a warm 23.7°C (74.7°F).

Heat index

The heat index value during September is calculated to be an extremely hot 40°C (104°F). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.
In reference to the heat index, it's for places in shade and with a slight wind. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a composite of temperature and humidity figures to convey how warm it feels. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. Elevated heat gain compared to the body's release capability poses risks of dehydration and potential overheating.

Humidity

In Wiang Sa, the average relative humidity in September is 80%.

Rainfall

In Wiang Sa, in September, during 25.4 rainfall days, 99mm (3.9") of precipitation is typically accumulated. Throughout the year, in Wiang Sa, Thailand, there are 259 rainfall days, and 1101mm (43.35") of precipitation is accumulated.

Daylight

In September, the average length of the day in Wiang Sa is 12h and 10min.
On the first day of September, sunrise is at 06:14 and sunset at 18:31. On the last day of the month, sunrise is at 06:11 and sunset at 18:14 +07.

Sunshine

In Wiang Sa, the average sunshine in September is 7.9h.

UV index

January through October, with an average maximum UV index of 7, are months with the highest UV index in Wiang Sa. A UV Index estimate of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 7 translates into the following recommendations:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. During bright days, sunglasses that offer UVA and UVB defense are recommended.