Weather
What is the weather like in Pattaya in September?
Short answer
September in Pattaya averages a high of 31.1 °C and a low of 25.4 °C, with 213.6 mm of rain on about 13.2 days. By the Thai Meteorological Department's 1991–2020 averages it is the second-wettest month of the year.
- 31.1 °CAverage daily high
- 25.4 °CAverage daily low
- 213.6 mmAverage rainfall for the month
- 13.2 daysAverage days with 1 mm of rain or more
- 81.3 %Average relative humidity
Checked · 3 sources · How we check
September weather in figures
These are 30-year averages (1991–2020) from the Thai Meteorological Department's Pattaya station, as TMD submitted them to the World Meteorological Organization.1 The station is at about 59 m above sea level, not on the beach.3
| Average daily high | 31.1 °C |
|---|---|
| Average daily low | 25.4 °C |
| Average temperature | 27.9 °C |
| Average rainfall for the month | 213.6 mm |
| Average days with 1 mm of rain or more | 13.2 days |
| Average relative humidity | 81.3 % |
| Average dew point | 24.3 °C |
Rain in September
Pattaya gets heavy rain in September: 213.6 mm on average, spread over about 13.2 days with at least 1 mm of rain.1 Across the year the station averages 1105.8 mm on 82.2 days.1
Heat and humidity in September
Days average 31.1 °C at their warmest and nights 25.4 °C at their coolest; the monthly mean is 27.9 °C. Average relative humidity is 81.3 % and the dew point 24.3 °C.1
Which season it is
September is in the rainy season (mid-May to mid-October, by the Thai Meteorological Department's dates).2
What to pack for September
- Light, breathable clothes: the average low is 25.4 °C, so evenings stay warm.1
- A compact umbrella or a light rain jacket: 13.2 days bring 1 mm of rain or more in an average September.1
- Sun protection: the average high is still 31.1 °C.1
- Quick-drying clothes: average humidity is 81.3 %.1
What to plan around in September
- Keep a rain plan for outdoor days: about 13.2 of the month's 30 days bring 1 mm of rain or more.1
- Check the marine forecast before a boat trip: this is one of the two wettest months.
- Check the forecast close to the date: these are 30-year averages, not a forecast (where to check).
Before you go
Averages describe a typical month, not the week of your trip. Close to the date, check the Thai Meteorological Department's forecast and warnings: where to check the official Pattaya forecast.
Compare the other months: August, October, or the best time to visit Pattaya.
Questions people ask
Does it rain a lot in Pattaya in September?
September averages 213.6 mm of rain on about 13.2 days, which makes it the second-wettest month of the year by the Thai Meteorological Department's 1991–2020 averages for Pattaya.
How hot is Pattaya in September?
The average daily high in September is 31.1 °C and the average daily low 25.4 °C, with average relative humidity of 81.3 %.
What season is September in Pattaya?
September is in Thailand's rainy season, which the Thai Meteorological Department dates from mid-May to mid-October.
Sources
- WMO climate normals 1991–2020, station data sheet for Phatthaya (Pattaya) 48461, as submitted by Thailand, Thai Meteorological Department, archived by NOAA NCEI. Checked 14 October 2026.
- ภูมิอากาศของประเทศไทย (Climate of Thailand), Thai Meteorological Department. Checked 14 October 2026.
- TMD Open Data: station list (Phatthaya, station 48461, 58.93 m above sea level), linked from data.tmd.go.th/api/index1.php, Thai Meteorological Department. Checked 14 October 2026.
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