Like other areas of Cambodia, Ratanakiri has a monsoonal climate with a rainy season from June to October, a cool season from November to January, and a hot season from March to May.. Ratanakiri tends to be cooler than elsewhere in Cambodia. The average daily high temperature in the province is , and the average daily low temperature is .. Annual precipitation is approximately . Flooding often occurs during the rainy season and has been exacerbated by the recently built Yali Falls Dam.; ; .
