Mason is located Warren County/Ohio and the second fastest growing county in Ohio. Location of Mason: country United States, State of Ohio, Warren County. Nearby towns and villages : South Lebanon, Maineville and Loveland.
In Mason, summers are hot and humid, winters are very cold and windy and it is partly cloudy all year round. During the course of the year, the temperature usually varies from -5 °C to 30 °C and rarely drops to less than -14 °C or rises to more than 34 °C.