Located in south-east Asia, Cambodia has warm to hot weather all year round. The climate is influenced by the monsoon cycle and the weather alternates between wet and dry. November to February is comparatively the coolest season of the year, followed by another dry spell and the period between March and May is hot and dry. Temperatures hover around 30 degree Celsius and touch 40 degrees in April. The hot season is punctuated by the onset of monsoons and the period between June and August is hot and wet. September and October are cooler months but the rains are still intense.
November to February is the best time to visit Cambodia. The cooler season makes travelling more pleasant. The rainy season later on means messy travelling, as some provincial areas have sub-standard roads which worsen during the rains. Rains can also be a dampener if you want to spend a day at the beach at Sihanoukville. However, to many the rainy season is the favourite time of the year as the temples appear more beautiful in this season and the water bodies around the temples also fill up, adding to the beauty of the already green and lush landscape.
Cambodia has four seasons: November to February is the cool/dry season, March to May is the hot/dry season, June to August is the hot/wet season and September to October is the cool/wet season. The highest rainfall occurs in September & October, with June-August still receiving plenty of rain.
Temperatures remain relatively constant throughout the year, and can range anywhere from 20-30 degrees celsius, approaching 40 degrees celsius in April, Cambodia's hottest month.