September weather forecast
Pattaya, Thailand

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The Sanctuary of Truth Temple in Pattaya, Thailand, in the middle of a lovely natural park garden
The Sanctuary of Truth Temple in Pattaya, Thailand, in the middle of a lovely natural park garden

Weather in September

September stands out for its maximum rainfall of the year - 205mm (8.07"). The month experiences the highest relative humidity of 81% among all. Slowly retracting temperatures and diminishing daylight accentuate the predominantly wet and cloudy weather. The reduction in sea temperature and sunshine hours should be considered while planning outdoor activities. Lush, rain-washed landscapes offer a different appeal to visitors during September.

Temperature

The shift from August to September is characterized by an average high-temperature of a still hot 31°C (87.8°F), not significantly different from the 31.2°C (88.2°F) of August. An average temperature of 25.2°C (77.4°F) is recorded in Pattaya during the nights in September.

Heat index

During September, the heat index is appraised at an extremely hot 41°C (105.8°F). Undertake extra safety actions, heat cramps and heat exhaustion are expected. Heatstroke may result from lengthy activity.
Heat index data is primarily for areas with shade and subjected to light winds. Exposure to direct sunlight may make the heat index values climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a measure of how hot it feels when the actual air humidity is factored in. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
Through perspiration, the body has a natural mechanism to eliminate excessive heat via sweat evaporation. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.

Humidity

In Pattaya, the average relative humidity in September is 81%.

Rainfall

In Pattaya, during September, the rain falls for 17 days and regularly aggregates up to 205mm (8.07") of precipitation. In Pattaya, during the entire year, the rain falls for 106 days and collects up to 1111mm (43.74") of precipitation.

Sea temperature

In September, the average sea temperature in Pattaya is 29.1°C (84.4°F).
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

In Pattaya, the average length of the day in September is 12h and 12min.
On the first day of the month, sunrise is at 06:05 and sunset at 18:27. On the last day of September, sunrise is at 06:05 and sunset at 18:07 +07.

Sunshine

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

UV index

February through September, with an average maximum UV index of 12, are months with the highest UV index in Pattaya, Thailand. A UV Index estimate of 11, and higher, represents an extreme threat to health from exposure to the Sun's UV rays for average individuals.
Note: The maximum daily UV index of 12 in September interprets into the following recommendations:
Take all necessary precautions, as unprotected skin can burn in minutes. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. After every outdoor workout or swim, liberally apply and frequently reapply a broad-spectrum SPF 30+ sunscreen. Caution! Sand and water surfaces escalate the UV intensity from the Sun.

Frequently asked questions

Is it hot in Pattaya during September?

During September, Pattaya experiences an average high-temperature of 31°C (87.8°F) and a low-temperature of 25.2°C (77.4°F). In September, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is appraised at 41°C (105.8°F).

What is the average humidity in September in Pattaya?

In September, the average relative humidity in Pattaya, Thailand, is 81%.

How much does it rain in Pattaya in September?

In September, in Pattaya, Thailand, the rain falls for 17 days. Throughout September, 205mm (8.07") of precipitation is accumulated.

What is the water temperature in September in Pattaya?

In Pattaya, Thailand, the average seawater temperature in September is 29.1°C (84.4°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the average length of the day in September in Pattaya?

In September, the average day length in Pattaya, Thailand, is 12h and 12min.

When are sunrise and sunset in September in Pattaya?

On the first day of September, sunrise is at 06:05 and sunset at 18:27. On the last day of the month, sunrise is at 06:05 and sunset at 18:07 +07.

What is the month with the least sunshine in Pattaya?

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

How long on average sun shines in September in Pattaya?

The average sunshine duration in September in Pattaya is 5h.

When is the highest UV index in Pattaya?

The months with the highest UV index in Pattaya, Thailand, are February through September, with an average maximum UV index of 12.

How high is the UV index in September in Pattaya?

In September, the average daily maximum UV index in Pattaya is 12. A UV Index estimate of 11, and higher, represents an extreme health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in September
Pattaya, Thailand

Average temperature in September - Pattaya, Thailand
  • Average high temperature in September: 31°C

The warmest month (with the highest average high temperature) is April (32.9°C).
The month with the lowest average high temperature is December (30°C).

  • Average low temperature in September: 25.2°C

The month with the highest average low temperature is May (26.4°C).
The coldest month (with the lowest average low temperature) is December (22.5°C).

Average humidity in September
Pattaya, Thailand

Average humidity in September - Pattaya, Thailand
  • Average humidity in September: 81%

The month with the highest relative humidity is October (83%).
The month with the lowest relative humidity is December (70%).

Average rainfall in September
Pattaya, Thailand

Average rainfall in September - Pattaya, Thailand
  • Average rainfall in September: 204.7mm

The wettest month (with the highest rainfall) is October (216.1mm).
The driest month (with the least rainfall) is December (8.3mm).

Average rainfall days in September
Pattaya, Thailand

Average rainfall days in September - Pattaya, Thailand
  • Average rainfall days in September: 17 days

The month with the highest number of rainy days is October (18 days).
The months with the least rainy days are January and December (1 days).

Average sea temperature in September
Pattaya, Thailand

Average sea temperature in September - Pattaya, Thailand
  • Average sea temperature in September: 29.1°C

The best month for swimming (with the highest average sea temperature) is May (30°C).
The coldest month (with the lowest average sea temperature) is January (27.2°C).

Average daylight in September /
Average sunshine in September
Pattaya, Thailand

Average daylight in September / Average sunshine in September - Pattaya, Thailand
  • Average daylight in September: 12h and 1min

The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 24min).

  • Average sunshine in September: 5h

The months with the most sunshine are January, February, March, April and December (Average sunshine: 8h).
The months with the least sunshine are June, July, August and September (Average sunshine: 5h).

Average UV index in September
Pattaya, Thailand

Average UV index in September - Pattaya, Thailand
  • Average UV index in September: 12

The months with the highest UV index are February, March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 9).

Pattaya, Thailand

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