The highest day temperature in September 2023 was 97°F. The lowest night temperature was 78°F. The average values for day and night temperatures during September were 90.1°F и 80.2°F respectivly.

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

Precipitation total in September for Siem Reap is 9.8 in. It makes september the most rainy month of the year.

The average wind speed in September is 5.3 mph. This value is relatively stable throughout the year.

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 Siem Reap in September is 5.4 hours.