Understanding the weather in Phumĭ Prêk Cham will help you enjoy your stay to the fullest. 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 Phumĭ Prêk Cham are September, October, May and August, with each month seeing an average of 242 mm of rainfall.