Located 10 to 13 degrees north of the Equator, like most of Southeast Asia, Cambodia varies from warm to very hot throughout the whole year. There are four annual seasons: cool and dry between November and February; hot and dry between March and May; hot and wet between June and August; and cool and wet between September and early November. The best time to visit is the cool season (November to February), when the weather usually benefits from a pleasant dry heat and the countryside is still green from the rains.
As February turns into March, the heat begins to build until April and May, when it can be quite oppressive and uncomfortable. In May and June, the rains come and bring a measure of relief. It rarely rains all day, and mostly it will rain for an hour or two in the afternoon or evening. By early September, the heat begins to dissipate and the evenings are cooler. Through October, the frequency of the showers slows and the humidity starts to lower. Although the wet season is low season for tourism throughout most of the region, visiting at that time does have its advantages. It is when the Angkor complex is at its most beautiful, the vegetation is lush, and the crowds are relatively thin.