May weather forecast
Cambodia

May in Cambodia marks the onset of the Southwest Monsoon, bringing the commencement of the wet season. During this month, the weather becomes notably more humid, with daily temperatures ranging from 25°C (77°F) to 34°C (93.2°F). Despite the start of the monsoon, the heat from the previous month persists, albeit with the humidity making the climate feel warmer.

In Phnom Penh, the temperatures hover around an average high of 34°C (93.2°F), while in Siem Reap, temperatures can reach up to 33°C (91.4°F). The coastal city of Sihanoukville experiences temperatures between 26°C (78.8°F) to 33°C (91.4°F), offering a slightly cooler respite due to its proximity to the sea.

Rainfall in May sees a significant increase compared to April, averaging 150mm (5.91") for the entire month. This rainfall is generally more frequent and intense, occurring mainly in the afternoons and evenings. The rains, though they mark the start of the monsoon, offer a refreshing contrast to the heat of the day.

Compared to April, May experiences a decrease in temperature but a marked increase in humidity and rainfall. As the country transitions into June, rainfall intensifies significantly, marking the full onset of the wet season. Despite the start of the monsoon, May still provides opportunities for visitors, especially those who can adapt to the humid climate and the afternoon showers. The landscape begins to turn lush and vibrant, offering a different yet equally mesmerizing aspect of Cambodia's natural beauty.

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• Phnom Penh - May »
  On the last day of the month, in Phnom Penh, sunrise is at 05:35 and sunset at 18:20 +07. May is characterized in Phnom Penh with the highest average highs of the year, peaking at 34.9°C (94.8°F) and positioning it as the hottest month.
• Kampot - May »
  May is the month with the warmest seawater in Kampot, with an average sea temperature of 30.5°C (86.9°F). The month with the warmest seawater in Kampot is May, with an average sea temperature of 30.5°C (86.9°F).
• Banlung - May »
  On the last day of May, in Banlung, sunrise is at 05:23 and sunset at 18:15 +07. On the first day of May in Banlung, sunrise is at 05:30 and sunset at 18:07.
• Kep - May »
  Under high air temperature coupled with high humidity, the body's perspiration is reduced, intensifying the sensation of heat. In May, the average heat index, which combines relative humidity and air temperature, is evaluated at 42°C (107.6°F).
• Paôy Pêt - May »
  January through June, August through November, with an average maximum UV index of 7, are months with the highest UV index in Paôy Pêt. Throughout the year, in Paôy Pêt, there are 217.4 rainfall days, and 949mm (37.36") of precipitation is accumulated.
• Pailin - May »
  The months with the highest UV index in Pailin are January through December, with an average maximum UV index of 7. January through December, with an average maximum UV index of 7, are months with the lowest UV index in Pailin, Cambodia.
• Krong Siem Reap - May »
  February through September, with an average maximum UV index of 12, are months with the highest UV index in Krong Siem Reap, Cambodia. In Krong Siem Reap, in May, during 15 rainfall days, 146mm (5.75") of precipitation is typically accumulated.
• Krong Preah Sihanouk - May »
  On the first day of May in Krong Preah Sihanouk sunrise is at 05:47 and sunset at 18:18. The month with the warmest seawater in Krong Preah Sihanouk is May, with an average sea temperature of 30.3°C (86.5°F).
• Memot - May »
  In Memot during May, the rain falls for 22.3 days and regularly aggregates up to 105mm (4.13") of precipitation. The months with the lowest UV index in Memot, Cambodia, are January, March through December, with an average maximum UV index of 7.