You'll likely spend much of your trip indoors, but if you're planning to venture beyond the casino, looking at local weather trends is a good idea. The hottest months are usually March and April, with an average temperature of 30°C, while the coldest months are January and December, with an average of 27°C. The rainiest months in Kampong Leav are September, October, May and August, with each month seeing an average of 242 mm of rainfall.