September weather forecast
Hua Hin, Thailand

The first month of the autumn, September, is still a hot month in Hua Hin, Thailand, with an average temperature fluctuating between 32.4°C (90.3°F) and 25°C (77°F).

Temperature

In Hua Hin, the average high-temperature in September is practically the same as in August - a still hot 32.4°C (90.3°F). In September, the average low-temperature is 25°C (77°F).

Heat index

In September, the average heat index is computed to be a burning hot 45°C (113°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 'real feel', 'feels like', 'apparent temperature', or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors like pregnancy, clothing, differences in body mass, height, and shape, and activity influence one's weather impression. 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 normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. 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

In September, the average relative humidity is 77%.

Rainfall

In Hua Hin, it is raining for 17 days, with typically 120mm (4.72") of accumulated precipitation. Throughout the year, in Hua Hin, there are 118 rainfall days, and 955mm (37.6") of precipitation is accumulated.

Sea temperature

In September, the average sea temperature is 29°C (84.2°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

In September, the average length of the day in Hua Hin is 12h and 12min.
On the first day of the month, sunrise is at 06:09 and sunset at 18:31. On the last day of September, in Hua Hin, sunrise is at 06:09 and sunset at 18:11 +07.

Sunshine

June through September, with an average of 5h of sunshine, are months with the least sunshine in Hua Hin.

UV index

The months with the highest UV index are February through October, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an ultimate health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The daily maximum UV index of 12 in September interpret into the following advice:
Practice all essential precautions. Protection against sun damage is crucial. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for the 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. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.