Climate averages 1991–2020
Surat Thani weather
in September.
A hot, wet month: the 8th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Surat Thani: daytime highs average 30.2°C and nights cool to about 23.9°C. By daytime temperature it is the 8th warmest of the 12 months.
Expect about 154 mm of rain on roughly 24 days, which makes September a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 11 min on an average September day.
The nearest other city in this atlas is Nakhon Si Thammarat (105 km away). In September its highs average 30.1°C, about as warm as Surat Thani, with 149 mm of rain.
Among the 46 cities listed in Thailand, Surat Thani ranks 28th of 46 for the warmest September highs and 4th of 46 for the driest September (rainfall, lowest first). The mean September high of those 46 cities is 30.3°C; Surat Thani is 0.1°C cooler than that mean.
From September to October, average highs fall by 1.0°C to 29.2°C, and monthly rainfall rises from 154 mm to 268 mm.
The annual picture
September in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Surat Thani climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 29.6°C22.6°C | 22.6°C | 68 | 9.5 | 11.712 h |
| February | 31.8°C22.9°C | 22.9°C | 32 | 4.8 | 11.812 h |
| March | 33.3°C24.0°C | 24.0°C | 92 | 9.1 | 12.112 h |
| April | 33.4°C24.9°C | 24.9°C | 114 | 14.4 | 12.312 h |
| May | 32.1°C24.9°C | 24.9°C | 124 | 22.1 | 12.513 h |
| June | 31.3°C24.6°C | 24.6°C | 95 | 18.6 | 12.613 h |
| July | 31.1°C24.4°C | 24.4°C | 89 | 18.4 | 12.613 h |
| August | 30.9°C24.3°C | 24.3°C | 108 | 19.7 | 12.412 h |
| September, selected | 30.2°C23.9°C | 23.9°C | 154 | 23.6 | 12.212 h |
| October | 29.2°C23.6°C | 23.6°C | 268 | 27.3 | 11.912 h |
| November | 28.6°C23.5°C | 23.5°C | 267 | 23.5 | 11.712 h |
| December | 28.4°C23.1°C | 23.1°C | 149 | 15.7 | 11.612 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
September in nearby cities
- Nakhon Si Thammarat in SeptemberThailand · 105 kmHigh 30.1°C · Low 23.8°C · 149 mm rain
- Phuket in SeptemberThailand · 173 kmHigh 27.8°C · Low 25.7°C · 311 mm rain
- Ban Mai in SeptemberThailand · 253 kmHigh 30.1°C · Low 25.5°C · 123 mm rain
- Hat Yai in SeptemberThailand · 268 kmHigh 30.4°C · Low 24.2°C · 164 mm rain
- Alor Setar in SeptemberMalaysia · 354 kmHigh 29.4°C · Low 24.2°C · 259 mm rain
- Yala in SeptemberThailand · 360 kmHigh 31.4°C · Low 23.2°C · 160 mm rain
- Pendang in SeptemberMalaysia · 372 kmHigh 29.5°C · Low 23.8°C · 254 mm rain
- Myeik in SeptemberMyanmar · 376 kmHigh 28.2°C · Low 23.8°C · 596 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Surat Thani) is explained once on the Surat Thani year overview and on the Sources, method and limits page.