Climate averages 1991–2020
Chatuchak weather
in September.
A hot, very wet month: the joint 9th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Chatuchak: daytime highs average 30.8°C and nights cool to about 24.9°C. By daytime temperature it is the joint 9th warmest of the 12 months.
Expect about 237 mm of rain on roughly 25 days, which makes September a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 12 h 13 min on an average September day.
The nearest other city in this atlas is Mueang Nonthaburi (6 km away). In September its highs average 31.2°C, about as warm as Chatuchak, with 237 mm of rain.
Among the 46 cities listed in Thailand, Chatuchak ranks joint 15th of 46 for the warmest September highs and joint 17th of 46 for the driest September (rainfall, lowest first). The mean September high of those 46 cities is 30.3°C; Chatuchak is 0.5°C warmer than that mean.
From September to October, average highs fall by 0.4°C to 30.4°C, and monthly rainfall falls from 237 mm to 191 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
Chatuchak climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.9°C21.6°C | 21.6°C | 15 | 2.9 | 11.411 h |
| February | 32.2°C23.3°C | 23.3°C | 13 | 2.8 | 11.712 h |
| March | 33.5°C25.2°C | 25.2°C | 41 | 6.3 | 12.012 h |
| April | 34.4°C26.5°C | 26.5°C | 68 | 10.3 | 12.412 h |
| May | 33.2°C26.4°C | 26.4°C | 130 | 20.0 | 12.813 h |
| June | 32.2°C26.0°C | 26.0°C | 127 | 21.8 | 12.913 h |
| July | 31.5°C25.6°C | 25.6°C | 134 | 22.9 | 12.913 h |
| August | 31.2°C25.4°C | 25.4°C | 144 | 23.6 | 12.613 h |
| September, selected | 30.8°C24.9°C | 24.9°C | 237 | 25.3 | 12.212 h |
| October | 30.4°C24.0°C | 24.0°C | 191 | 20.7 | 11.812 h |
| November | 30.8°C22.9°C | 22.9°C | 42 | 6.4 | 11.511 h |
| December | 30.5°C21.5°C | 21.5°C | 9.5 | 1.7 | 11.311 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
- Mueang Nonthaburi in SeptemberThailand · 6 kmHigh 31.2°C · Low 24.8°C · 237 mm rain
- Bangkok in SeptemberThailand · 10 kmHigh 30.9°C · Low 24.9°C · 237 mm rain
- Watthana in SeptemberThailand · 11 kmHigh 30.7°C · Low 25.1°C · 237 mm rain
- Bueng Kum in SeptemberThailand · 13 kmHigh 30.8°C · Low 24.9°C · 254 mm rain
- Sai Mai in SeptemberThailand · 14 kmHigh 31.0°C · Low 24.7°C · 284 mm rain
- Ban Khlong Prawet in SeptemberThailand · 18 kmHigh 30.8°C · Low 25.2°C · 254 mm rain
- Phra Pradaeng in SeptemberThailand · 19 kmHigh 30.8°C · Low 25.2°C · 237 mm rain
- Khlong Sam Wa in SeptemberThailand · 20 kmHigh 31.0°C · Low 24.7°C · 254 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 Chatuchak) is explained once on the Chatuchak year overview and on the Sources, method and limits page.
Bangkok, Mueang Nonthaburi and Phra Pradaeng lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.