The highest day temperature in September 2023 was 98°F. The lowest night temperature was 80°F. The average values for day and night temperatures during September were 93.3°F и 82.3°F respectivly.

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

Precipitation total in September for Phnom Penh is 7.8 in. It makes september one of the most rainy months of the year.

The average wind speed in September is 6.2 mph. It makes September one of the most windless months of the year for Phnom Penh.

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 Phnom Penh in September is 5.8 hours.