Cambodia has the archetypal tropical weather of the region with basically four seasons. The cooler, dry season is from about November to February, and this is the most popular time to stopover. December and January in particular are idyllic as humidity is low. There’s a lot of walking involved when viewing the temple complexes around Angkor Wat, which is most aptly done in the cooler season. The idyllic months are December and January, when humidity levels are moderately low, there is little rainfall and a cooling breeze whips across the land, but this is also peak season when the majority of visitors come down on the country.
From early February temperatures keep mounting until the killer month, April, when the mercury often exceeds 40°C. Sometime in May or June, the south-western monsoon brings rain and high humidity, cooking up a sweat for all but the hardiest of visitors. The wet season, which lasts until October, isn’t such a bad time to visit, as the rain tends to come in short, prickly downpours. Angkor is bounded by lush foliage and the moats are full of water at this time of year. If you are planning to visit secluded areas, however, the wet season makes for tough travel. Some visitors like to manage their trip with one of the annual festivals, such as Bon Om Tuk or Khmer New Year.