September weather forecast
Cambodia

September in Cambodia marks the tail end of the wet season, exhibiting continued heavy rainfall and high humidity. During this month, average temperatures fluctuate between 24°C (75.2°F) and 31°C (87.8°F). Despite the cooling trend compared to the hotter months, the high humidity level contributes to a persistently warm climate.

In Phnom Penh, the nation's capital, average high temperatures settle around 31°C (87.8°F). Siem Reap, known for the historic Angkor Wat, also experiences similar temperature trends. The coastal city of Sihanoukville continues to offer a refreshing coastal climate with temperatures between 25°C (77°F) to 30°C (86°F).

September is typically the wettest month in Cambodia, with average precipitation reaching approximately 250mm (9.84"). These showers, which mostly occur in the afternoons and evenings, are often heavy but short-lived. Despite the high frequency of rainfall, mornings and early afternoons often present clearer skies and dry weather, conducive for outdoor activities.

When compared to August, September experiences a slight drop in temperatures while maintaining high levels of rainfall. As the transition into October occurs, the monsoon starts to recede, signaling the approach of the dry season. Despite the challenge posed by the heavy rains, September offers a unique opportunity to observe Cambodia's lush and vibrant landscapes, especially for visitors who appreciate the beauty of the monsoon season.

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• Phnom Penh - September »
  The months with the highest humidity are September and October, with an average relative humidity of 84%. The months with the highest humidity in Phnom Penh are September and October, with an average relative humidity of 84%.
• Kampot - September »
  On the first day of September in Kampot, sunrise is at 05:53 and sunset at 18:13. On the first day of September in Kampot, sunrise is at 05:53 and sunset at 18:13.
• Banlung - September »
  June through September, with an average of 5h of sunshine, are months with the least sunshine in Banlung, Cambodia. The months with the highest UV index in Banlung, Cambodia, are February through September, with an average maximum UV index of 12.
• Kep - September »
  The average heat index, which takes the relative humidity and factors it into the air temperature reading, in September is estimated at 36°C (96.8°F). The months with the highest humidity in Kep are September and October, with an average relative humidity of 80%.
• Paôy Pêt - September »
  The month with the most rainfall in Paôy Pêt is September, when the rain falls for 27.8 days and typically aggregates up to 172mm (6.77") of precipitation. The most humid month in Paôy Pêt is September, with an average relative humidity of 84%.
• Pailin - September »
  The months of July and September see the lowest levels of Pailin's temperatures, averaging a high of 29.6°C (85.3°F). In Pailin, during September, the rain falls for 28.4 days and regularly aggregates up to 222mm (8.74") of precipitation.
• Krong Siem Reap - September »
  The month with the most rainfall in Krong Siem Reap is September, when the rain falls for 18 days and typically aggregates up to 250mm (9.84") of precipitation. On the first day of September in Krong Siem Reap sunrise is at 05:53 and sunset at 18:16.
• Krong Preah Sihanouk - September »
  In Krong Preah Sihanouk in September, during 21 rainfall days, 321mm (12.64") of precipitation is typically accumulated. The months with the least sunshine in Krong Preah Sihanouk are July through September, with an average of 5h of sunshine.
• Memot - September »
  In Memot during September, the rain falls for 26.3 days and regularly aggregates up to 184mm (7.24") of precipitation. On the first day of September in Memot, Cambodia, sunrise is at 05:44 and sunset at 18:06.