Bangkok · Thailand
September
Peak monsoon — 255mm of rain. Only visit if weather doesn't affect your plans.
Worth considering
#11 of 12 months
There are better months for Bangkok — see the full ranking below.
See when to go instead →Climate
High
31°C
Low
23.8°C
Rain
255mm
Sun
5.2hrs/day
30-year climate normals · Open Meteo ERA5
How September scores in Bangkok
Weather
Low
Value
Outstanding
Crowds
Outstanding
Events
Below average
Atmosphere
Above average
What you gain in September
- ↑Cheapest month of the year: extraordinary hotel rates, even at luxury properties
- ↑Virtually no international tourists — the city is entirely local
- ↑Rain cools the heat significantly — actually one of the more pleasant temperature months
What you sacrifice
- ↓255mm of rain: the most in any month — expect flooding in central areas
- ↓Many outdoor attractions partially or fully closed after heavy rain events
- ↓Transit delays common when streets flood after sustained downpours
How September compares to November (best month)
| Factor | September | November ★ |
|---|---|---|
| Weather | 2 | 9 |
| Value | 9 | 6 |
| Crowds | 9 | 6 |
September in other destinations
Climate data: 30-year normals (1991–2020) from Open Meteo ERA5 reanalysis. Scores compare months within Bangkok, not across destinations. Methodology →