September weather forecast
Krong Siem Reap, Cambodia

September stands as the wettest month, climatologically, in Krong Siem Reap. Presented as a continuation of August's trend, September's weather characteristics include similar temperature ranges. However, one striking difference is in precipitation, with rainfall reaching a yearly high of 250mm (9.84"). This solidifies the month's position at the peak of the rainy season. September's rainy afternoons make it ideal for those with a preference for dramatic weather, and the need for sun protection remains high due to maintained UV radiation levels.

Temperature

The shift into September finds Krong Siem Reap at an average high-temperature of a still hot 31°C (87.8°F), closely comparable to August's conditions. During the nights in September, an average low-temperature of 24°C (75.2°F) is observed in Krong Siem Reap.

Rainfall

The month with the most rainfall is September, when the rain falls for 18 days and typically aggregates up to 250mm (9.84") of precipitation.

Daylight

The average length of the day in September is 12h and 13min.
On the first day of the month, sunrise is at 05:53 and sunset at 18:15. On the last day of September, in Krong Siem Reap, sunrise is at 05:53 and sunset at 17:55 +07.

Sunshine

August and September, with an average of 5h of sunshine, are months with the least sunshine in Krong Siem Reap.

UV index

February through September, with an average maximum UV index of 12, are months with the highest UV index. A UV Index estimate of 11, and higher, represents an extreme health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The maximum UV index of 12 during September translates into these guidelines:
Implement all necessary safeguards, unprotected skin might suffer burns rapidly. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Even when it's cloudy, ensure the generous application and frequent reapplication of a sunscreen with at least 30 SPF, particularly post swim or outdoor activity.