Siem Reap Weather in September


Season: Rainy Season

Generally speaking, Siem Reap weather in September is not so hot, but humid and quite rainy. The day time high temperature reaches 30℃ (86℉) on average while the average low temperature keeps at 26℃(79℉) at night. The humidity rises to about 77%. This month is dominated by much rainfall as the precipitation accumulates to around 266mm and there are 21 rainy days on average based on historical records.    

Travelers might be annoyed by muddy and wet streets, and exploring the temples in the distance would become a little difficult. Nevertheless, in September, there are also fewer travelers and the travel cost is not as high as in the peak season. 


Averages for Siem Reap Weather in September

Temperature: 28°C / 82°F
High Temperature: 30°C / 86°F
Low Temperature: 26°C / 79°F
Humidity: 77%
Rainfall: 266 mm
Rainy Days: 21 days
Sunrise: 05:53 ~ 05:54
Sunset: 17:55 ~ 18:16

Clothes to Wear in Siem Reap in September

In September, visitors who plan to visit Siem Reap should prepare some light and breathable clothes due to the sultry and wet weather. Short sleeve shirts, cotton blouses, and light jeans are recommended. Thin hoodies are also useful in cool mornings or at nights. Sleeveless tops, shorts and skirts should be avoided and cover your knees and shoulders well when visiting temples.  
Siem Reap Clothes in September September Wear in Siem Reap

Top Things to Do in Siem Reap in September

Recommendation Rate of Travel:

Referring to the things to do in Siem Reap in September, the archaeological site Angkor Wat built in the 12th century should be your top choice. Spend at least one day exploring all the temple highlights including the impressive sunrise vista over the Temple of Angkor Wat, the mysterious smiling faces of Bayon Temple, and Ta Prohm Temple covered by giant trees and roots, which is also known as the “Tomb Raider Temple”. Besides, there are many interesting activities to do in Siem Reap and one of them is enjoying the fantastic and traditional Apsara Dance performance at night. Riding bicycles to explore Siem Reap’s beautiful countryside is also a good option. Last but not least, it’s unforgettable to soak up in Pub Street and stroll around the bustling night market to experience vibrant Siem Reap night life.  


1. Prepare mosquito repellent as the rainy season in Siem Reap is favored by mosquitoes. 
2. Most rainfall occurs in the afternoon, so arrange your itinerary accordingly and check the real-time weather forecast before going out.
- Last updated on Mar. 24, 2023 by Kate Liu -