Siem Reap experiences a tropical climate divided into dry and wet seasons, but it is important to note that it tends to be hot and muggy all year round.

Cambodia has two distinctive seasons: dry and wet. From November through May is the dry season and June through October is the wet season. Cooler temperatures are from December to February with temperatures still reaching around 86°F, but dropping at night. The hotter season is March through May where temperatures can reach a high of 91°F with April being the hottest month with scorching temperatures around 104°F with high humidity.

Monsoon season is during the months of September and October with afternoon and evening downpours and flash floods are common. All of the rain helps the splendid vegetation become lush with blooming flowers. With fewer tourists, the wet season is the quietest time to visit.