Climate averages 1991–2020
Chanthaburi weather
in September.
A hot, very wet month: the coolest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a hot month in Chanthaburi: daytime highs average 28.7°C and nights cool to about 24.5°C. By daytime temperature it is the coolest month of the year.
Expect about 363 mm of rain on roughly 29 days, which makes September a very wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 12 min on an average September day.
The nearest other city in this atlas is Rayong (92 km away). In September its highs average 29.4°C, 0.6°C warmer than Chanthaburi, with 300 mm of rain.
Among the 46 cities listed in Thailand, Chanthaburi ranks 45th of 46 for the warmest September highs and 46th of 46 for the driest September (rainfall, lowest first). The mean September high of those 46 cities is 30.3°C; Chanthaburi is 1.6°C cooler than that mean.
From September to October, average highs rise by 0.6°C to 29.4°C, and monthly rainfall falls from 363 mm to 238 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
Chanthaburi climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 30.4°C22.2°C | 22.2°C | 29 | 6.2 | 11.511 h |
| February | 30.7°C23.2°C | 23.2°C | 33 | 8.2 | 11.712 h |
| March | 30.9°C24.6°C | 24.6°C | 85 | 15.1 | 12.112 h |
| April | 31.0°C25.4°C | 25.4°C | 122 | 18.8 | 12.412 h |
| May | 30.0°C25.5°C | 25.5°C | 320 | 28.2 | 12.713 h |
| June | 29.2°C25.3°C | 25.3°C | 384 | 28.4 | 12.913 h |
| July | 28.8°C25.0°C | 25.0°C | 369 | 29.6 | 12.813 h |
| August | 28.8°C24.9°C | 24.9°C | 328 | 29.2 | 12.513 h |
| September, selected | 28.7°C24.5°C | 24.5°C | 363 | 28.8 | 12.212 h |
| October | 29.4°C24.0°C | 24.0°C | 238 | 23.0 | 11.912 h |
| November | 29.9°C23.4°C | 23.4°C | 46 | 7.9 | 11.612 h |
| December | 30.0°C22.3°C | 22.3°C | 16 | 3.2 | 11.411 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
- Rayong in SeptemberThailand · 92 kmHigh 29.4°C · Low 25.1°C · 300 mm rain
- Paoy Paet in SeptemberCambodia · 127 kmHigh 30.0°C · Low 24.0°C · 237 mm rain
- Battambang in SeptemberCambodia · 131 kmHigh 31.2°C · Low 24.5°C · 192 mm rain
- Pattaya in SeptemberThailand · 137 kmHigh 29.8°C · Low 25.7°C · 242 mm rain
- Si Racha in SeptemberThailand · 142 kmHigh 30.1°C · Low 25.4°C · 232 mm rain
- Laem Chabang in SeptemberThailand · 143 kmHigh 29.6°C · Low 25.6°C · 242 mm rain
- Chon Buri in SeptemberThailand · 147 kmHigh 30.4°C · Low 25.0°C · 232 mm rain
- Kabin Buri in SeptemberThailand · 155 kmHigh 29.7°C · Low 23.6°C · 283 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 Chanthaburi) is explained once on the Chanthaburi year overview and on the Sources, method and limits page.