The highest day temperature in September 2025 was 97°F. The lowest night temperature was 80°F. The average values for day and night temperatures during September were 91.6°F и 82.5°F respectivly.

The average sea surface temperature in September 2025 for Bangkok was 88.8°F. The maximum and minimum values were 88.2°F and 89.8°F respectively.

Most of the days in September are cloudy but you can also expect sunny or gloomy days.

Precipitation total in September for Bangkok is 6.4 in. It makes september one of the most rainy months of the year.

The average wind speed in September is 6.7 mph.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Bangkok in September is 5.4 hours.